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Finding the Fourth Proportional to 71,785.49, 99,061.88 and 39,953.70

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Solution

The fourth proportional to 71,785.49, 99,061.88 and 39,953.70 is: 55,134.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,785.49 : 99,061.88 = 39,953.70 : x
  2. Step 2: Convert to fraction form
    71,785.49/99,061.88 = 39,953.70/x
  3. Step 3: Cross multiply
    71,785.49x = 99,061.88 × 39,953.70
  4. Step 4: Simplify right side
    71,785.49x = 3,957,888,435.19
  5. Step 5: Solve for x
    x = 3,957,888,435.19/71,785.49
  6. Step 6: Final answer
    x = 55,134.94

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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.