Home / 138,136.28-207,267.30-67,020.53

Finding the Fourth Proportional to 138,136.28, 207,267.30 and 67,020.53

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Solution

The fourth proportional to 138,136.28, 207,267.30 and 67,020.53 is: 100,561.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,136.28 : 207,267.30 = 67,020.53 : x
  2. Step 2: Convert to fraction form
    138,136.28/207,267.30 = 67,020.53/x
  3. Step 3: Cross multiply
    138,136.28x = 207,267.30 × 67,020.53
  4. Step 4: Simplify right side
    138,136.28x = 13,891,163,261.33
  5. Step 5: Solve for x
    x = 13,891,163,261.33/138,136.28
  6. Step 6: Final answer
    x = 100,561.30

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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.