Home / 86,453.48-129,680.22-66,760.76

Finding the Fourth Proportional to 86,453.48, 129,680.22 and 66,760.76

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Solution

The fourth proportional to 86,453.48, 129,680.22 and 66,760.76 is: 100,141.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,453.48 : 129,680.22 = 66,760.76 : x
  2. Step 2: Convert to fraction form
    86,453.48/129,680.22 = 66,760.76/x
  3. Step 3: Cross multiply
    86,453.48x = 129,680.22 × 66,760.76
  4. Step 4: Simplify right side
    86,453.48x = 8,657,550,044.17
  5. Step 5: Solve for x
    x = 8,657,550,044.17/86,453.48
  6. Step 6: Final answer
    x = 100,141.14

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Double scale
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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.