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Finding the Fourth Proportional to 257,979.66, 386,940.30 and 89,468.88

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Solution

The fourth proportional to 257,979.66, 386,940.30 and 89,468.88 is: 134,193.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,979.66 : 386,940.30 = 89,468.88 : x
  2. Step 2: Convert to fraction form
    257,979.66/386,940.30 = 89,468.88/x
  3. Step 3: Cross multiply
    257,979.66x = 386,940.30 × 89,468.88
  4. Step 4: Simplify right side
    257,979.66x = 34,619,115,267.86
  5. Step 5: Solve for x
    x = 34,619,115,267.86/257,979.66
  6. Step 6: Final answer
    x = 134,193.20

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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.