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Finding the Fourth Proportional to 92,469.48, 138,750.30 and 39,892.20

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Solution

The fourth proportional to 92,469.48, 138,750.30 and 39,892.20 is: 59,858.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,469.48 : 138,750.30 = 39,892.20 : x
  2. Step 2: Convert to fraction form
    92,469.48/138,750.30 = 39,892.20/x
  3. Step 3: Cross multiply
    92,469.48x = 138,750.30 × 39,892.20
  4. Step 4: Simplify right side
    92,469.48x = 5,535,054,717.66
  5. Step 5: Solve for x
    x = 5,535,054,717.66/92,469.48
  6. Step 6: Final answer
    x = 59,858.18

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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.