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Finding the Fourth Proportional to 70,031.97, 96,640.17 and 39,813.09

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Solution

The fourth proportional to 70,031.97, 96,640.17 and 39,813.09 is: 54,939.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,031.97 : 96,640.17 = 39,813.09 : x
  2. Step 2: Convert to fraction form
    70,031.97/96,640.17 = 39,813.09/x
  3. Step 3: Cross multiply
    70,031.97x = 96,640.17 × 39,813.09
  4. Step 4: Simplify right side
    70,031.97x = 3,847,543,785.83
  5. Step 5: Solve for x
    x = 3,847,543,785.83/70,031.97
  6. Step 6: Final answer
    x = 54,939.82

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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.