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Finding the Fourth Proportional to 124,913.80, 187,305.90 and 45,987.40

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Solution

The fourth proportional to 124,913.80, 187,305.90 and 45,987.40 is: 68,957.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,913.80 : 187,305.90 = 45,987.40 : x
  2. Step 2: Convert to fraction form
    124,913.80/187,305.90 = 45,987.40/x
  3. Step 3: Cross multiply
    124,913.80x = 187,305.90 × 45,987.40
  4. Step 4: Simplify right side
    124,913.80x = 8,613,711,345.66
  5. Step 5: Solve for x
    x = 8,613,711,345.66/124,913.80
  6. Step 6: Final answer
    x = 68,957.24

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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.