Home / 128,628,963,137.44-177,384,778,928.40-85,156,432,193.44

Finding the Fourth Proportional to 128,628,963,137.44, 177,384,778,928.40 and 85,156,432,193.44

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Solution

The fourth proportional to 128,628,963,137.44, 177,384,778,928.40 and 85,156,432,193.44 is: 117,434,320,626.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,628,963,137.44 : 177,384,778,928.40 = 85,156,432,193.44 : x
  2. Step 2: Convert to fraction form
    128,628,963,137.44/177,384,778,928.40 = 85,156,432,193.44/x
  3. Step 3: Cross multiply
    128,628,963,137.44x = 177,384,778,928.40 × 85,156,432,193.44
  4. Step 4: Simplify right side
    128,628,963,137.44x = 15,105,454,898,964,638,728,192
  5. Step 5: Solve for x
    x = 15,105,454,898,964,638,728,192/128,628,963,137.44
  6. Step 6: Final answer
    x = 117,434,320,626.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.