Home / 100,454.72-138,624.80-55,132.64

Finding the Fourth Proportional to 100,454.72, 138,624.80 and 55,132.64

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Solution

The fourth proportional to 100,454.72, 138,624.80 and 55,132.64 is: 76,081.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,454.72 : 138,624.80 = 55,132.64 : x
  2. Step 2: Convert to fraction form
    100,454.72/138,624.80 = 55,132.64/x
  3. Step 3: Cross multiply
    100,454.72x = 138,624.80 × 55,132.64
  4. Step 4: Simplify right side
    100,454.72x = 7,642,751,193.47
  5. Step 5: Solve for x
    x = 7,642,751,193.47/100,454.72
  6. Step 6: Final answer
    x = 76,081.55

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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.