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Finding the Fourth Proportional to 55,129.70, 82,500.15 and 38,411.30

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Solution

The fourth proportional to 55,129.70, 82,500.15 and 38,411.30 is: 57,481.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,129.70 : 82,500.15 = 38,411.30 : x
  2. Step 2: Convert to fraction form
    55,129.70/82,500.15 = 38,411.30/x
  3. Step 3: Cross multiply
    55,129.70x = 82,500.15 × 38,411.30
  4. Step 4: Simplify right side
    55,129.70x = 3,168,938,011.70
  5. Step 5: Solve for x
    x = 3,168,938,011.70/55,129.70
  6. Step 6: Final answer
    x = 57,481.50

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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.