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Finding the Fourth Proportional to 100,480.42, 138,654.28 and 55,158.24

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Solution

The fourth proportional to 100,480.42, 138,654.28 and 55,158.24 is: 76,113.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,480.42 : 138,654.28 = 55,158.24 : x
  2. Step 2: Convert to fraction form
    100,480.42/138,654.28 = 55,158.24/x
  3. Step 3: Cross multiply
    100,480.42x = 138,654.28 × 55,158.24
  4. Step 4: Simplify right side
    100,480.42x = 7,647,926,053.27
  5. Step 5: Solve for x
    x = 7,647,926,053.27/100,480.42
  6. Step 6: Final answer
    x = 76,113.60

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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.