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Finding the Fourth Proportional to 61,689.78, 92,520.82 and 28,377.84

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Solution

The fourth proportional to 61,689.78, 92,520.82 and 28,377.84 is: 42,560.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,689.78 : 92,520.82 = 28,377.84 : x
  2. Step 2: Convert to fraction form
    61,689.78/92,520.82 = 28,377.84/x
  3. Step 3: Cross multiply
    61,689.78x = 92,520.82 × 28,377.84
  4. Step 4: Simplify right side
    61,689.78x = 2,625,541,026.63
  5. Step 5: Solve for x
    x = 2,625,541,026.63/61,689.78
  6. Step 6: Final answer
    x = 42,560.39

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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.