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Finding the Fourth Proportional to 272,374.02, 408,626.64 and 85,385.52

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Solution

The fourth proportional to 272,374.02, 408,626.64 and 85,385.52 is: 128,098.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,374.02 : 408,626.64 = 85,385.52 : x
  2. Step 2: Convert to fraction form
    272,374.02/408,626.64 = 85,385.52/x
  3. Step 3: Cross multiply
    272,374.02x = 408,626.64 × 85,385.52
  4. Step 4: Simplify right side
    272,374.02x = 34,890,798,142.25
  5. Step 5: Solve for x
    x = 34,890,798,142.25/272,374.02
  6. Step 6: Final answer
    x = 128,098.85

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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.