Home / 100,966.18-139,334.26-55,645.78

Finding the Fourth Proportional to 100,966.18, 139,334.26 and 55,645.78

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Solution

The fourth proportional to 100,966.18, 139,334.26 and 55,645.78 is: 76,791.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,966.18 : 139,334.26 = 55,645.78 : x
  2. Step 2: Convert to fraction form
    100,966.18/139,334.26 = 55,645.78/x
  3. Step 3: Cross multiply
    100,966.18x = 139,334.26 × 55,645.78
  4. Step 4: Simplify right side
    100,966.18x = 7,753,363,578.42
  5. Step 5: Solve for x
    x = 7,753,363,578.42/100,966.18
  6. Step 6: Final answer
    x = 76,791.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.