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Finding the Fourth Proportional to 144,961.80, 217,442.70 and 91,817.70

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Solution

The fourth proportional to 144,961.80, 217,442.70 and 91,817.70 is: 137,726.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,961.80 : 217,442.70 = 91,817.70 : x
  2. Step 2: Convert to fraction form
    144,961.80/217,442.70 = 91,817.70/x
  3. Step 3: Cross multiply
    144,961.80x = 217,442.70 × 91,817.70
  4. Step 4: Simplify right side
    144,961.80x = 19,965,088,595.79
  5. Step 5: Solve for x
    x = 19,965,088,595.79/144,961.80
  6. Step 6: Final answer
    x = 137,726.55

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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.