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Finding the Fourth Proportional to 123,924.60, 171,016.56 and 72,939.24

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Solution

The fourth proportional to 123,924.60, 171,016.56 and 72,939.24 is: 100,656.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,924.60 : 171,016.56 = 72,939.24 : x
  2. Step 2: Convert to fraction form
    123,924.60/171,016.56 = 72,939.24/x
  3. Step 3: Cross multiply
    123,924.60x = 171,016.56 × 72,939.24
  4. Step 4: Simplify right side
    123,924.60x = 12,473,817,913.81
  5. Step 5: Solve for x
    x = 12,473,817,913.81/123,924.60
  6. Step 6: Final answer
    x = 100,656.51

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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.