Home / 128,091.85-176,753.07-74,366.78

Finding the Fourth Proportional to 128,091.85, 176,753.07 and 74,366.78

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Solution

The fourth proportional to 128,091.85, 176,753.07 and 74,366.78 is: 102,618.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,091.85 : 176,753.07 = 74,366.78 : x
  2. Step 2: Convert to fraction form
    128,091.85/176,753.07 = 74,366.78/x
  3. Step 3: Cross multiply
    128,091.85x = 176,753.07 × 74,366.78
  4. Step 4: Simplify right side
    128,091.85x = 13,144,555,787.25
  5. Step 5: Solve for x
    x = 13,144,555,787.25/128,091.85
  6. Step 6: Final answer
    x = 102,618.21

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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.