Home / 86,136.20-129,204.30-66,453.20

Finding the Fourth Proportional to 86,136.20, 129,204.30 and 66,453.20

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Solution

The fourth proportional to 86,136.20, 129,204.30 and 66,453.20 is: 99,679.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,136.20 : 129,204.30 = 66,453.20 : x
  2. Step 2: Convert to fraction form
    86,136.20/129,204.30 = 66,453.20/x
  3. Step 3: Cross multiply
    86,136.20x = 129,204.30 × 66,453.20
  4. Step 4: Simplify right side
    86,136.20x = 8,586,039,188.76
  5. Step 5: Solve for x
    x = 8,586,039,188.76/86,136.20
  6. Step 6: Final answer
    x = 99,679.80

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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.