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Finding the Fourth Proportional to 218,929.80, 328,139.55 and 100,613.10

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Solution

The fourth proportional to 218,929.80, 328,139.55 and 100,613.10 is: 150,802.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,929.80 : 328,139.55 = 100,613.10 : x
  2. Step 2: Convert to fraction form
    218,929.80/328,139.55 = 100,613.10/x
  3. Step 3: Cross multiply
    218,929.80x = 328,139.55 × 100,613.10
  4. Step 4: Simplify right side
    218,929.80x = 33,015,137,358.11
  5. Step 5: Solve for x
    x = 33,015,137,358.11/218,929.80
  6. Step 6: Final answer
    x = 150,802.39

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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.