Home / 100,229.11-138,316.20-54,908.72

Finding the Fourth Proportional to 100,229.11, 138,316.20 and 54,908.72

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Solution

The fourth proportional to 100,229.11, 138,316.20 and 54,908.72 is: 75,774.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,229.11 : 138,316.20 = 54,908.72 : x
  2. Step 2: Convert to fraction form
    100,229.11/138,316.20 = 54,908.72/x
  3. Step 3: Cross multiply
    100,229.11x = 138,316.20 × 54,908.72
  4. Step 4: Simplify right side
    100,229.11x = 7,594,765,118.46
  5. Step 5: Solve for x
    x = 7,594,765,118.46/100,229.11
  6. Step 6: Final answer
    x = 75,774.05

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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.