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Finding the Fourth Proportional to 124,898.64, 187,335.81 and 68,720.28

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Solution

The fourth proportional to 124,898.64, 187,335.81 and 68,720.28 is: 103,073.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,898.64 : 187,335.81 = 68,720.28 : x
  2. Step 2: Convert to fraction form
    124,898.64/187,335.81 = 68,720.28/x
  3. Step 3: Cross multiply
    124,898.64x = 187,335.81 × 68,720.28
  4. Step 4: Simplify right side
    124,898.64x = 12,873,769,317.23
  5. Step 5: Solve for x
    x = 12,873,769,317.23/124,898.64
  6. Step 6: Final answer
    x = 103,073.73

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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.