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Finding the Fourth Proportional to 442,061.64, 663,089.72 and 126,519.45

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Solution

The fourth proportional to 442,061.64, 663,089.72 and 126,519.45 is: 189,778.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,061.64 : 663,089.72 = 126,519.45 : x
  2. Step 2: Convert to fraction form
    442,061.64/663,089.72 = 126,519.45/x
  3. Step 3: Cross multiply
    442,061.64x = 663,089.72 × 126,519.45
  4. Step 4: Simplify right side
    442,061.64x = 83,893,746,042.46
  5. Step 5: Solve for x
    x = 83,893,746,042.46/442,061.64
  6. Step 6: Final answer
    x = 189,778.39

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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.