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Finding the Fourth Proportional to 124,697.28, 171,987 and 79,382.64

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Solution

The fourth proportional to 124,697.28, 171,987 and 79,382.64 is: 109,487.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,697.28 : 171,987 = 79,382.64 : x
  2. Step 2: Convert to fraction form
    124,697.28/171,987 = 79,382.64/x
  3. Step 3: Cross multiply
    124,697.28x = 171,987 × 79,382.64
  4. Step 4: Simplify right side
    124,697.28x = 13,652,782,105.68
  5. Step 5: Solve for x
    x = 13,652,782,105.68/124,697.28
  6. Step 6: Final answer
    x = 109,487.41

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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.