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Finding the Fourth Proportional to 238,267.74, 328,815.21 and 129,376.71

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Solution

The fourth proportional to 238,267.74, 328,815.21 and 129,376.71 is: 178,542.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,267.74 : 328,815.21 = 129,376.71 : x
  2. Step 2: Convert to fraction form
    238,267.74/328,815.21 = 129,376.71/x
  3. Step 3: Cross multiply
    238,267.74x = 328,815.21 × 129,376.71
  4. Step 4: Simplify right side
    238,267.74x = 42,541,030,067.76
  5. Step 5: Solve for x
    x = 42,541,030,067.76/238,267.74
  6. Step 6: Final answer
    x = 178,542.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.