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Finding the Fourth Proportional to 61,141.80, 84,393.45 and 39,630.90

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Solution

The fourth proportional to 61,141.80, 84,393.45 and 39,630.90 is: 54,702.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,141.80 : 84,393.45 = 39,630.90 : x
  2. Step 2: Convert to fraction form
    61,141.80/84,393.45 = 39,630.90/x
  3. Step 3: Cross multiply
    61,141.80x = 84,393.45 × 39,630.90
  4. Step 4: Simplify right side
    61,141.80x = 3,344,588,377.61
  5. Step 5: Solve for x
    x = 3,344,588,377.61/61,141.80
  6. Step 6: Final answer
    x = 54,702.16

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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.