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Finding the Fourth Proportional to 61,520.16, 92,221.92 and 19,938

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Solution

The fourth proportional to 61,520.16, 92,221.92 and 19,938 is: 29,888.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,520.16 : 92,221.92 = 19,938 : x
  2. Step 2: Convert to fraction form
    61,520.16/92,221.92 = 19,938/x
  3. Step 3: Cross multiply
    61,520.16x = 92,221.92 × 19,938
  4. Step 4: Simplify right side
    61,520.16x = 1,838,720,640.96
  5. Step 5: Solve for x
    x = 1,838,720,640.96/61,520.16
  6. Step 6: Final answer
    x = 29,888.10

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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.