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Finding the Fourth Proportional to 257,478.52, 386,242.60 and 79,937.86

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Solution

The fourth proportional to 257,478.52, 386,242.60 and 79,937.86 is: 119,914.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,478.52 : 386,242.60 = 79,937.86 : x
  2. Step 2: Convert to fraction form
    257,478.52/386,242.60 = 79,937.86/x
  3. Step 3: Cross multiply
    257,478.52x = 386,242.60 × 79,937.86
  4. Step 4: Simplify right side
    257,478.52x = 30,875,404,953.62
  5. Step 5: Solve for x
    x = 30,875,404,953.62/257,478.52
  6. Step 6: Final answer
    x = 119,914.49

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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.