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Finding the Fourth Proportional to 111,668.89, 154,108.97 and 63,280.20

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Solution

The fourth proportional to 111,668.89, 154,108.97 and 63,280.20 is: 87,330.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,668.89 : 154,108.97 = 63,280.20 : x
  2. Step 2: Convert to fraction form
    111,668.89/154,108.97 = 63,280.20/x
  3. Step 3: Cross multiply
    111,668.89x = 154,108.97 × 63,280.20
  4. Step 4: Simplify right side
    111,668.89x = 9,752,046,443.39
  5. Step 5: Solve for x
    x = 9,752,046,443.39/111,668.89
  6. Step 6: Final answer
    x = 87,330.02

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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.