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Finding the Fourth Proportional to 92,112.60, 138,168.58 and 39,487.96

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Solution

The fourth proportional to 92,112.60, 138,168.58 and 39,487.96 is: 59,231.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,112.60 : 138,168.58 = 39,487.96 : x
  2. Step 2: Convert to fraction form
    92,112.60/138,168.58 = 39,487.96/x
  3. Step 3: Cross multiply
    92,112.60x = 138,168.58 × 39,487.96
  4. Step 4: Simplify right side
    92,112.60x = 5,455,995,360.30
  5. Step 5: Solve for x
    x = 5,455,995,360.30/92,112.60
  6. Step 6: Final answer
    x = 59,231.80

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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.