Home / 83,238.11-125,127.81-66,778.20

Finding the Fourth Proportional to 83,238.11, 125,127.81 and 66,778.20

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Solution

The fourth proportional to 83,238.11, 125,127.81 and 66,778.20 is: 100,384.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,238.11 : 125,127.81 = 66,778.20 : x
  2. Step 2: Convert to fraction form
    83,238.11/125,127.81 = 66,778.20/x
  3. Step 3: Cross multiply
    83,238.11x = 125,127.81 × 66,778.20
  4. Step 4: Simplify right side
    83,238.11x = 8,355,809,921.74
  5. Step 5: Solve for x
    x = 8,355,809,921.74/83,238.11
  6. Step 6: Final answer
    x = 100,384.43

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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.