Home / 100,549.20-138,759.58-55,231.39

Finding the Fourth Proportional to 100,549.20, 138,759.58 and 55,231.39

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Solution

The fourth proportional to 100,549.20, 138,759.58 and 55,231.39 is: 76,220.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,549.20 : 138,759.58 = 55,231.39 : x
  2. Step 2: Convert to fraction form
    100,549.20/138,759.58 = 55,231.39/x
  3. Step 3: Cross multiply
    100,549.20x = 138,759.58 × 55,231.39
  4. Step 4: Simplify right side
    100,549.20x = 7,663,884,479.22
  5. Step 5: Solve for x
    x = 7,663,884,479.22/100,549.20
  6. Step 6: Final answer
    x = 76,220.24

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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.