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Finding the Fourth Proportional to 268,979.52, 403,352.52 and 91,438.80

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Solution

The fourth proportional to 268,979.52, 403,352.52 and 91,438.80 is: 137,118.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,979.52 : 403,352.52 = 91,438.80 : x
  2. Step 2: Convert to fraction form
    268,979.52/403,352.52 = 91,438.80/x
  3. Step 3: Cross multiply
    268,979.52x = 403,352.52 × 91,438.80
  4. Step 4: Simplify right side
    268,979.52x = 36,882,070,405.78
  5. Step 5: Solve for x
    x = 36,882,070,405.78/268,979.52
  6. Step 6: Final answer
    x = 137,118.51

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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.