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Finding the Fourth Proportional to 100,179, 138,247.02 and 55,469.88

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Solution

The fourth proportional to 100,179, 138,247.02 and 55,469.88 is: 76,548.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,179 : 138,247.02 = 55,469.88 : x
  2. Step 2: Convert to fraction form
    100,179/138,247.02 = 55,469.88/x
  3. Step 3: Cross multiply
    100,179x = 138,247.02 × 55,469.88
  4. Step 4: Simplify right side
    100,179x = 7,668,545,609.76
  5. Step 5: Solve for x
    x = 7,668,545,609.76/100,179
  6. Step 6: Final answer
    x = 76,548.43

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1.5x scale

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.