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Finding the Fourth Proportional to 154,426.68, 231,481.40 and 87,724.40

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Solution

The fourth proportional to 154,426.68, 231,481.40 and 87,724.40 is: 131,496.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,426.68 : 231,481.40 = 87,724.40 : x
  2. Step 2: Convert to fraction form
    154,426.68/231,481.40 = 87,724.40/x
  3. Step 3: Cross multiply
    154,426.68x = 231,481.40 × 87,724.40
  4. Step 4: Simplify right side
    154,426.68x = 20,306,565,330.13
  5. Step 5: Solve for x
    x = 20,306,565,330.13/154,426.68
  6. Step 6: Final answer
    x = 131,496.48

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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.