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Finding the Fourth Proportional to 108,405.87, 149,606.37 and 60,658.80

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Solution

The fourth proportional to 108,405.87, 149,606.37 and 60,658.80 is: 83,712.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,405.87 : 149,606.37 = 60,658.80 : x
  2. Step 2: Convert to fraction form
    108,405.87/149,606.37 = 60,658.80/x
  3. Step 3: Cross multiply
    108,405.87x = 149,606.37 × 60,658.80
  4. Step 4: Simplify right side
    108,405.87x = 9,074,942,876.56
  5. Step 5: Solve for x
    x = 9,074,942,876.56/108,405.87
  6. Step 6: Final answer
    x = 83,712.65

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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.