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Finding the Fourth Proportional to 236,909.86, 326,934.81 and 129,479.86

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Solution

The fourth proportional to 236,909.86, 326,934.81 and 129,479.86 is: 178,681.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,909.86 : 326,934.81 = 129,479.86 : x
  2. Step 2: Convert to fraction form
    236,909.86/326,934.81 = 129,479.86/x
  3. Step 3: Cross multiply
    236,909.86x = 326,934.81 × 129,479.86
  4. Step 4: Simplify right side
    236,909.86x = 42,331,471,793.25
  5. Step 5: Solve for x
    x = 42,331,471,793.25/236,909.86
  6. Step 6: Final answer
    x = 178,681.77

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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.