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Finding the Fourth Proportional to 71,002.78, 97,983.82 and 39,171.68

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Solution

The fourth proportional to 71,002.78, 97,983.82 and 39,171.68 is: 54,056.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,002.78 : 97,983.82 = 39,171.68 : x
  2. Step 2: Convert to fraction form
    71,002.78/97,983.82 = 39,171.68/x
  3. Step 3: Cross multiply
    71,002.78x = 97,983.82 × 39,171.68
  4. Step 4: Simplify right side
    71,002.78x = 3,838,190,842.22
  5. Step 5: Solve for x
    x = 3,838,190,842.22/71,002.78
  6. Step 6: Final answer
    x = 54,056.91

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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.