Home / 138,192.75-207,280.89-81,298.62

Finding the Fourth Proportional to 138,192.75, 207,280.89 and 81,298.62

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Solution

The fourth proportional to 138,192.75, 207,280.89 and 81,298.62 is: 121,943.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,192.75 : 207,280.89 = 81,298.62 : x
  2. Step 2: Convert to fraction form
    138,192.75/207,280.89 = 81,298.62/x
  3. Step 3: Cross multiply
    138,192.75x = 207,280.89 × 81,298.62
  4. Step 4: Simplify right side
    138,192.75x = 16,851,650,309.37
  5. Step 5: Solve for x
    x = 16,851,650,309.37/138,192.75
  6. Step 6: Final answer
    x = 121,943.09

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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.