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Finding the Fourth Proportional to 92,109.20, 138,082.80 and 62,430.80

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Solution

The fourth proportional to 92,109.20, 138,082.80 and 62,430.80 is: 93,591.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,109.20 : 138,082.80 = 62,430.80 : x
  2. Step 2: Convert to fraction form
    92,109.20/138,082.80 = 62,430.80/x
  3. Step 3: Cross multiply
    92,109.20x = 138,082.80 × 62,430.80
  4. Step 4: Simplify right side
    92,109.20x = 8,620,619,670.24
  5. Step 5: Solve for x
    x = 8,620,619,670.24/92,109.20
  6. Step 6: Final answer
    x = 93,591.30

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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.