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Finding the Fourth Proportional to 220,613.78, 331,030.02 and 87,491.09

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Solution

The fourth proportional to 220,613.78, 331,030.02 and 87,491.09 is: 131,280.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,613.78 : 331,030.02 = 87,491.09 : x
  2. Step 2: Convert to fraction form
    220,613.78/331,030.02 = 87,491.09/x
  3. Step 3: Cross multiply
    220,613.78x = 331,030.02 × 87,491.09
  4. Step 4: Simplify right side
    220,613.78x = 28,962,177,272.52
  5. Step 5: Solve for x
    x = 28,962,177,272.52/220,613.78
  6. Step 6: Final answer
    x = 131,280.00

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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.