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Finding the Fourth Proportional to 144,139.70, 216,215.01 and 38,958.71

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Solution

The fourth proportional to 144,139.70, 216,215.01 and 38,958.71 is: 58,439.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,139.70 : 216,215.01 = 38,958.71 : x
  2. Step 2: Convert to fraction form
    144,139.70/216,215.01 = 38,958.71/x
  3. Step 3: Cross multiply
    144,139.70x = 216,215.01 × 38,958.71
  4. Step 4: Simplify right side
    144,139.70x = 8,423,456,791.16
  5. Step 5: Solve for x
    x = 8,423,456,791.16/144,139.70
  6. Step 6: Final answer
    x = 58,439.54

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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.