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Finding the Fourth Proportional to 144,382.66, 216,770.49 and 81,247.39

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Solution

The fourth proportional to 144,382.66, 216,770.49 and 81,247.39 is: 121,981.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,382.66 : 216,770.49 = 81,247.39 : x
  2. Step 2: Convert to fraction form
    144,382.66/216,770.49 = 81,247.39/x
  3. Step 3: Cross multiply
    144,382.66x = 216,770.49 × 81,247.39
  4. Step 4: Simplify right side
    144,382.66x = 17,612,036,514.21
  5. Step 5: Solve for x
    x = 17,612,036,514.21/144,382.66
  6. Step 6: Final answer
    x = 121,981.66

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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.