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Finding the Fourth Proportional to 144,339.62, 216,705.76 and 81,204.17

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Solution

The fourth proportional to 144,339.62, 216,705.76 and 81,204.17 is: 121,916.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,339.62 : 216,705.76 = 81,204.17 : x
  2. Step 2: Convert to fraction form
    144,339.62/216,705.76 = 81,204.17/x
  3. Step 3: Cross multiply
    144,339.62x = 216,705.76 × 81,204.17
  4. Step 4: Simplify right side
    144,339.62x = 17,597,411,375.02
  5. Step 5: Solve for x
    x = 17,597,411,375.02/144,339.62
  6. Step 6: Final answer
    x = 121,916.71

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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.