Home / 83,109.53-124,664.28-20,780.03

Finding the Fourth Proportional to 83,109.53, 124,664.28 and 20,780.03

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Solution

The fourth proportional to 83,109.53, 124,664.28 and 20,780.03 is: 31,170.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,109.53 : 124,664.28 = 20,780.03 : x
  2. Step 2: Convert to fraction form
    83,109.53/124,664.28 = 20,780.03/x
  3. Step 3: Cross multiply
    83,109.53x = 124,664.28 × 20,780.03
  4. Step 4: Simplify right side
    83,109.53x = 2,590,526,751.11
  5. Step 5: Solve for x
    x = 2,590,526,751.11/83,109.53
  6. Step 6: Final answer
    x = 31,170.03

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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.