Home / 128,193.45-176,756.88-87,381.73

Finding the Fourth Proportional to 128,193.45, 176,756.88 and 87,381.73

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Solution

The fourth proportional to 128,193.45, 176,756.88 and 87,381.73 is: 120,484.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,193.45 : 176,756.88 = 87,381.73 : x
  2. Step 2: Convert to fraction form
    128,193.45/176,756.88 = 87,381.73/x
  3. Step 3: Cross multiply
    128,193.45x = 176,756.88 × 87,381.73
  4. Step 4: Simplify right side
    128,193.45x = 15,445,321,963.80
  5. Step 5: Solve for x
    x = 15,445,321,963.80/128,193.45
  6. Step 6: Final answer
    x = 120,484.49

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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.