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Finding the Fourth Proportional to 144,857.20, 217,026.60 and 89,388.40

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Solution

The fourth proportional to 144,857.20, 217,026.60 and 89,388.40 is: 133,922.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,857.20 : 217,026.60 = 89,388.40 : x
  2. Step 2: Convert to fraction form
    144,857.20/217,026.60 = 89,388.40/x
  3. Step 3: Cross multiply
    144,857.20x = 217,026.60 × 89,388.40
  4. Step 4: Simplify right side
    144,857.20x = 19,399,660,531.44
  5. Step 5: Solve for x
    x = 19,399,660,531.44/144,857.20
  6. Step 6: Final answer
    x = 133,922.65

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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.