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Finding the Fourth Proportional to 129,069.12, 193,487.04 and 89,644.80

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Solution

The fourth proportional to 129,069.12, 193,487.04 and 89,644.80 is: 134,386.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,069.12 : 193,487.04 = 89,644.80 : x
  2. Step 2: Convert to fraction form
    129,069.12/193,487.04 = 89,644.80/x
  3. Step 3: Cross multiply
    129,069.12x = 193,487.04 × 89,644.80
  4. Step 4: Simplify right side
    129,069.12x = 17,345,107,003.39
  5. Step 5: Solve for x
    x = 17,345,107,003.39/129,069.12
  6. Step 6: Final answer
    x = 134,386.19

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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.