Home / 100,205.28-138,285.39-54,885.18

Finding the Fourth Proportional to 100,205.28, 138,285.39 and 54,885.18

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Solution

The fourth proportional to 100,205.28, 138,285.39 and 54,885.18 is: 75,742.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,205.28 : 138,285.39 = 54,885.18 : x
  2. Step 2: Convert to fraction form
    100,205.28/138,285.39 = 54,885.18/x
  3. Step 3: Cross multiply
    100,205.28x = 138,285.39 × 54,885.18
  4. Step 4: Simplify right side
    100,205.28x = 7,589,818,521.52
  5. Step 5: Solve for x
    x = 7,589,818,521.52/100,205.28
  6. Step 6: Final answer
    x = 75,742.70

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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.