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Finding the Fourth Proportional to 218,478.87, 301,645.85 and 136,929.69

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Solution

The fourth proportional to 218,478.87, 301,645.85 and 136,929.69 is: 189,053.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,478.87 : 301,645.85 = 136,929.69 : x
  2. Step 2: Convert to fraction form
    218,478.87/301,645.85 = 136,929.69/x
  3. Step 3: Cross multiply
    218,478.87x = 301,645.85 × 136,929.69
  4. Step 4: Simplify right side
    218,478.87x = 41,304,272,045.64
  5. Step 5: Solve for x
    x = 41,304,272,045.64/218,478.87
  6. Step 6: Final answer
    x = 189,053.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.