Home / 83,431.06-125,129.73-30,121.42

Finding the Fourth Proportional to 83,431.06, 125,129.73 and 30,121.42

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Solution

The fourth proportional to 83,431.06, 125,129.73 and 30,121.42 is: 45,176.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,431.06 : 125,129.73 = 30,121.42 : x
  2. Step 2: Convert to fraction form
    83,431.06/125,129.73 = 30,121.42/x
  3. Step 3: Cross multiply
    83,431.06x = 125,129.73 × 30,121.42
  4. Step 4: Simplify right side
    83,431.06x = 3,769,085,151.82
  5. Step 5: Solve for x
    x = 3,769,085,151.82/83,431.06
  6. Step 6: Final answer
    x = 45,176.04

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1.5x scale

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.