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Finding the Fourth Proportional to 108,151.78, 149,247.87 and 60,405.79

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Solution

The fourth proportional to 108,151.78, 149,247.87 and 60,405.79 is: 83,359.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,151.78 : 149,247.87 = 60,405.79 : x
  2. Step 2: Convert to fraction form
    108,151.78/149,247.87 = 60,405.79/x
  3. Step 3: Cross multiply
    108,151.78x = 149,247.87 × 60,405.79
  4. Step 4: Simplify right side
    108,151.78x = 9,015,435,493.17
  5. Step 5: Solve for x
    x = 9,015,435,493.17/108,151.78
  6. Step 6: Final answer
    x = 83,359.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.