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Finding the Fourth Proportional to 89,420.39, 134,006.03 and 67,207.88

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Solution

The fourth proportional to 89,420.39, 134,006.03 and 67,207.88 is: 100,718.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,420.39 : 134,006.03 = 67,207.88 : x
  2. Step 2: Convert to fraction form
    89,420.39/134,006.03 = 67,207.88/x
  3. Step 3: Cross multiply
    89,420.39x = 134,006.03 × 67,207.88
  4. Step 4: Simplify right side
    89,420.39x = 9,006,260,964.27
  5. Step 5: Solve for x
    x = 9,006,260,964.27/89,420.39
  6. Step 6: Final answer
    x = 100,718.20

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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.