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Finding the Fourth Proportional to 71,785.03, 99,064.28 and 39,523.40

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Solution

The fourth proportional to 71,785.03, 99,064.28 and 39,523.40 is: 54,542.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,785.03 : 99,064.28 = 39,523.40 : x
  2. Step 2: Convert to fraction form
    71,785.03/99,064.28 = 39,523.40/x
  3. Step 3: Cross multiply
    71,785.03x = 99,064.28 × 39,523.40
  4. Step 4: Simplify right side
    71,785.03x = 3,915,357,164.15
  5. Step 5: Solve for x
    x = 3,915,357,164.15/71,785.03
  6. Step 6: Final answer
    x = 54,542.81

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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.