Home / 83,780.28-125,670.06-21,450.60

Finding the Fourth Proportional to 83,780.28, 125,670.06 and 21,450.60

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Solution

The fourth proportional to 83,780.28, 125,670.06 and 21,450.60 is: 32,175.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,780.28 : 125,670.06 = 21,450.60 : x
  2. Step 2: Convert to fraction form
    83,780.28/125,670.06 = 21,450.60/x
  3. Step 3: Cross multiply
    83,780.28x = 125,670.06 × 21,450.60
  4. Step 4: Simplify right side
    83,780.28x = 2,695,698,189.04
  5. Step 5: Solve for x
    x = 2,695,698,189.04/83,780.28
  6. Step 6: Final answer
    x = 32,175.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.