Home / 100,972.31-139,346.33-60,704.78

Finding the Fourth Proportional to 100,972.31, 139,346.33 and 60,704.78

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Solution

The fourth proportional to 100,972.31, 139,346.33 and 60,704.78 is: 83,775.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,972.31 : 139,346.33 = 60,704.78 : x
  2. Step 2: Convert to fraction form
    100,972.31/139,346.33 = 60,704.78/x
  3. Step 3: Cross multiply
    100,972.31x = 139,346.33 × 60,704.78
  4. Step 4: Simplify right side
    100,972.31x = 8,458,987,306.20
  5. Step 5: Solve for x
    x = 8,458,987,306.20/100,972.31
  6. Step 6: Final answer
    x = 83,775.32

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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.