Home / 100,620.38-138,825.81-60,319.43

Finding the Fourth Proportional to 100,620.38, 138,825.81 and 60,319.43

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Solution

The fourth proportional to 100,620.38, 138,825.81 and 60,319.43 is: 83,222.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,620.38 : 138,825.81 = 60,319.43 : x
  2. Step 2: Convert to fraction form
    100,620.38/138,825.81 = 60,319.43/x
  3. Step 3: Cross multiply
    100,620.38x = 138,825.81 × 60,319.43
  4. Step 4: Simplify right side
    100,620.38x = 8,373,893,773.96
  5. Step 5: Solve for x
    x = 8,373,893,773.96/100,620.38
  6. Step 6: Final answer
    x = 83,222.65

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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.