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Finding the Fourth Proportional to 100,398.62, 150,643.89 and 43,489.92

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Solution

The fourth proportional to 100,398.62, 150,643.89 and 43,489.92 is: 65,254.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,398.62 : 150,643.89 = 43,489.92 : x
  2. Step 2: Convert to fraction form
    100,398.62/150,643.89 = 43,489.92/x
  3. Step 3: Cross multiply
    100,398.62x = 150,643.89 × 43,489.92
  4. Step 4: Simplify right side
    100,398.62x = 6,551,490,724.59
  5. Step 5: Solve for x
    x = 6,551,490,724.59/100,398.62
  6. Step 6: Final answer
    x = 65,254.79

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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.