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Finding the Fourth Proportional to 92,509.62, 138,819.78 and 39,919.10

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Solution

The fourth proportional to 92,509.62, 138,819.78 and 39,919.10 is: 59,902.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,509.62 : 138,819.78 = 39,919.10 : x
  2. Step 2: Convert to fraction form
    92,509.62/138,819.78 = 39,919.10/x
  3. Step 3: Cross multiply
    92,509.62x = 138,819.78 × 39,919.10
  4. Step 4: Simplify right side
    92,509.62x = 5,541,559,985.70
  5. Step 5: Solve for x
    x = 5,541,559,985.70/92,509.62
  6. Step 6: Final answer
    x = 59,902.53

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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.