Home / 128,876.52-177,445.44-117,066.72

Finding the Fourth Proportional to 128,876.52, 177,445.44 and 117,066.72

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Solution

The fourth proportional to 128,876.52, 177,445.44 and 117,066.72 is: 161,184.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,876.52 : 177,445.44 = 117,066.72 : x
  2. Step 2: Convert to fraction form
    128,876.52/177,445.44 = 117,066.72/x
  3. Step 3: Cross multiply
    128,876.52x = 177,445.44 × 117,066.72
  4. Step 4: Simplify right side
    128,876.52x = 20,772,955,639.76
  5. Step 5: Solve for x
    x = 20,772,955,639.76/128,876.52
  6. Step 6: Final answer
    x = 161,184.95

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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.