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Finding the Fourth Proportional to 218,891.04, 328,172.40 and 92,679.20

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Solution

The fourth proportional to 218,891.04, 328,172.40 and 92,679.20 is: 138,949.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,891.04 : 328,172.40 = 92,679.20 : x
  2. Step 2: Convert to fraction form
    218,891.04/328,172.40 = 92,679.20/x
  3. Step 3: Cross multiply
    218,891.04x = 328,172.40 × 92,679.20
  4. Step 4: Simplify right side
    218,891.04x = 30,414,755,494.08
  5. Step 5: Solve for x
    x = 30,414,755,494.08/218,891.04
  6. Step 6: Final answer
    x = 138,949.29

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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.