Home / 100,499.18-138,689.48-55,179.14

Finding the Fourth Proportional to 100,499.18, 138,689.48 and 55,179.14

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Solution

The fourth proportional to 100,499.18, 138,689.48 and 55,179.14 is: 76,147.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,499.18 : 138,689.48 = 55,179.14 : x
  2. Step 2: Convert to fraction form
    100,499.18/138,689.48 = 55,179.14/x
  3. Step 3: Cross multiply
    100,499.18x = 138,689.48 × 55,179.14
  4. Step 4: Simplify right side
    100,499.18x = 7,652,765,677.95
  5. Step 5: Solve for x
    x = 7,652,765,677.95/100,499.18
  6. Step 6: Final answer
    x = 76,147.55

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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.