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Finding the Fourth Proportional to 144,744.40, 217,116.60 and 137,141.20

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Solution

The fourth proportional to 144,744.40, 217,116.60 and 137,141.20 is: 205,711.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,744.40 : 217,116.60 = 137,141.20 : x
  2. Step 2: Convert to fraction form
    144,744.40/217,116.60 = 137,141.20/x
  3. Step 3: Cross multiply
    144,744.40x = 217,116.60 × 137,141.20
  4. Step 4: Simplify right side
    144,744.40x = 29,775,631,063.92
  5. Step 5: Solve for x
    x = 29,775,631,063.92/144,744.40
  6. Step 6: Final answer
    x = 205,711.80

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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.