Home / 138,136.57-207,204.84-91,378.51

Finding the Fourth Proportional to 138,136.57, 207,204.84 and 91,378.51

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Solution

The fourth proportional to 138,136.57, 207,204.84 and 91,378.51 is: 137,067.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,136.57 : 207,204.84 = 91,378.51 : x
  2. Step 2: Convert to fraction form
    138,136.57/207,204.84 = 91,378.51/x
  3. Step 3: Cross multiply
    138,136.57x = 207,204.84 × 91,378.51
  4. Step 4: Simplify right side
    138,136.57x = 18,934,069,543.99
  5. Step 5: Solve for x
    x = 18,934,069,543.99/138,136.57
  6. Step 6: Final answer
    x = 137,067.76

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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.