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Finding the Fourth Proportional to 61,394, 84,724.68 and 39,068.24

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Solution

The fourth proportional to 61,394, 84,724.68 and 39,068.24 is: 53,914.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,394 : 84,724.68 = 39,068.24 : x
  2. Step 2: Convert to fraction form
    61,394/84,724.68 = 39,068.24/x
  3. Step 3: Cross multiply
    61,394x = 84,724.68 × 39,068.24
  4. Step 4: Simplify right side
    61,394x = 3,310,044,132.16
  5. Step 5: Solve for x
    x = 3,310,044,132.16/61,394
  6. Step 6: Final answer
    x = 53,914.78

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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.