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Finding the Fourth Proportional to 641,337.82, 961,979.13 and 168,012.70

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Solution

The fourth proportional to 641,337.82, 961,979.13 and 168,012.70 is: 252,011.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,337.82 : 961,979.13 = 168,012.70 : x
  2. Step 2: Convert to fraction form
    641,337.82/961,979.13 = 168,012.70/x
  3. Step 3: Cross multiply
    641,337.82x = 961,979.13 × 168,012.70
  4. Step 4: Simplify right side
    641,337.82x = 161,624,710,974.95
  5. Step 5: Solve for x
    x = 161,624,710,974.95/641,337.82
  6. Step 6: Final answer
    x = 252,011.82

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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.