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Finding the Fourth Proportional to 84,085.76, 126,128.40 and 27,930.20

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Solution

The fourth proportional to 84,085.76, 126,128.40 and 27,930.20 is: 41,895.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,085.76 : 126,128.40 = 27,930.20 : x
  2. Step 2: Convert to fraction form
    84,085.76/126,128.40 = 27,930.20/x
  3. Step 3: Cross multiply
    84,085.76x = 126,128.40 × 27,930.20
  4. Step 4: Simplify right side
    84,085.76x = 3,522,791,437.68
  5. Step 5: Solve for x
    x = 3,522,791,437.68/84,085.76
  6. Step 6: Final answer
    x = 41,895.22

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Similar ratio
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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.