Home / 100,118.40-138,155.76-54,786.24

Finding the Fourth Proportional to 100,118.40, 138,155.76 and 54,786.24

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Solution

The fourth proportional to 100,118.40, 138,155.76 and 54,786.24 is: 75,600.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,118.40 : 138,155.76 = 54,786.24 : x
  2. Step 2: Convert to fraction form
    100,118.40/138,155.76 = 54,786.24/x
  3. Step 3: Cross multiply
    100,118.40x = 138,155.76 × 54,786.24
  4. Step 4: Simplify right side
    100,118.40x = 7,569,034,624.74
  5. Step 5: Solve for x
    x = 7,569,034,624.74/100,118.40
  6. Step 6: Final answer
    x = 75,600.83

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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.