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Finding the Fourth Proportional to 220,613.66, 330,811.18 and 78,437.63

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Solution

The fourth proportional to 220,613.66, 330,811.18 and 78,437.63 is: 117,617.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,613.66 : 330,811.18 = 78,437.63 : x
  2. Step 2: Convert to fraction form
    220,613.66/330,811.18 = 78,437.63/x
  3. Step 3: Cross multiply
    220,613.66x = 330,811.18 × 78,437.63
  4. Step 4: Simplify right side
    220,613.66x = 25,948,042,890.46
  5. Step 5: Solve for x
    x = 25,948,042,890.46/220,613.66
  6. Step 6: Final answer
    x = 117,617.57

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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.