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Finding the Fourth Proportional to 61,385.10, 92,110.05 and 28,110.30

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Solution

The fourth proportional to 61,385.10, 92,110.05 and 28,110.30 is: 42,180.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,385.10 : 92,110.05 = 28,110.30 : x
  2. Step 2: Convert to fraction form
    61,385.10/92,110.05 = 28,110.30/x
  3. Step 3: Cross multiply
    61,385.10x = 92,110.05 × 28,110.30
  4. Step 4: Simplify right side
    61,385.10x = 2,589,241,138.52
  5. Step 5: Solve for x
    x = 2,589,241,138.52/61,385.10
  6. Step 6: Final answer
    x = 42,180.29

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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.