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Finding the Fourth Proportional to 71,490.67, 107,306.17 and 59,720.09

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Solution

The fourth proportional to 71,490.67, 107,306.17 and 59,720.09 is: 89,638.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,490.67 : 107,306.17 = 59,720.09 : x
  2. Step 2: Convert to fraction form
    71,490.67/107,306.17 = 59,720.09/x
  3. Step 3: Cross multiply
    71,490.67x = 107,306.17 × 59,720.09
  4. Step 4: Simplify right side
    71,490.67x = 6,408,333,444.12
  5. Step 5: Solve for x
    x = 6,408,333,444.12/71,490.67
  6. Step 6: Final answer
    x = 89,638.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.