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Finding the Fourth Proportional to 218,616.80, 328,078.80 and 94,047.20

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Solution

The fourth proportional to 218,616.80, 328,078.80 and 94,047.20 is: 141,136.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,616.80 : 328,078.80 = 94,047.20 : x
  2. Step 2: Convert to fraction form
    218,616.80/328,078.80 = 94,047.20/x
  3. Step 3: Cross multiply
    218,616.80x = 328,078.80 × 94,047.20
  4. Step 4: Simplify right side
    218,616.80x = 30,854,892,519.36
  5. Step 5: Solve for x
    x = 30,854,892,519.36/218,616.80
  6. Step 6: Final answer
    x = 141,136.88

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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.