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Finding the Fourth Proportional to 108,471.80, 149,686.70 and 63,151.08

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Solution

The fourth proportional to 108,471.80, 149,686.70 and 63,151.08 is: 87,145.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,471.80 : 149,686.70 = 63,151.08 : x
  2. Step 2: Convert to fraction form
    108,471.80/149,686.70 = 63,151.08/x
  3. Step 3: Cross multiply
    108,471.80x = 149,686.70 × 63,151.08
  4. Step 4: Simplify right side
    108,471.80x = 9,452,876,766.64
  5. Step 5: Solve for x
    x = 9,452,876,766.64/108,471.80
  6. Step 6: Final answer
    x = 87,145.94

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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.