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Finding the Fourth Proportional to 220,565.60, 330,934.80 and 87,423.20

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Solution

The fourth proportional to 220,565.60, 330,934.80 and 87,423.20 is: 131,169.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,565.60 : 330,934.80 = 87,423.20 : x
  2. Step 2: Convert to fraction form
    220,565.60/330,934.80 = 87,423.20/x
  3. Step 3: Cross multiply
    220,565.60x = 330,934.80 × 87,423.20
  4. Step 4: Simplify right side
    220,565.60x = 28,931,379,207.36
  5. Step 5: Solve for x
    x = 28,931,379,207.36/220,565.60
  6. Step 6: Final answer
    x = 131,169.05

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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.