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Finding the Fourth Proportional to 66,385.80, 91,607.22 and 38,085.48

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Solution

The fourth proportional to 66,385.80, 91,607.22 and 38,085.48 is: 52,554.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,385.80 : 91,607.22 = 38,085.48 : x
  2. Step 2: Convert to fraction form
    66,385.80/91,607.22 = 38,085.48/x
  3. Step 3: Cross multiply
    66,385.80x = 91,607.22 × 38,085.48
  4. Step 4: Simplify right side
    66,385.80x = 3,488,904,945.17
  5. Step 5: Solve for x
    x = 3,488,904,945.17/66,385.80
  6. Step 6: Final answer
    x = 52,554.99

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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.