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Finding the Fourth Proportional to 145,634.01, 218,171.13 and 89,309.88

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Solution

The fourth proportional to 145,634.01, 218,171.13 and 89,309.88 is: 133,793.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,634.01 : 218,171.13 = 89,309.88 : x
  2. Step 2: Convert to fraction form
    145,634.01/218,171.13 = 89,309.88/x
  3. Step 3: Cross multiply
    145,634.01x = 218,171.13 × 89,309.88
  4. Step 4: Simplify right side
    145,634.01x = 19,484,837,439.76
  5. Step 5: Solve for x
    x = 19,484,837,439.76/145,634.01
  6. Step 6: Final answer
    x = 133,793.18

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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.