Home / 100,961.20-139,329.12-57,944.20

Finding the Fourth Proportional to 100,961.20, 139,329.12 and 57,944.20

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Solution

The fourth proportional to 100,961.20, 139,329.12 and 57,944.20 is: 79,964.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,961.20 : 139,329.12 = 57,944.20 : x
  2. Step 2: Convert to fraction form
    100,961.20/139,329.12 = 57,944.20/x
  3. Step 3: Cross multiply
    100,961.20x = 139,329.12 × 57,944.20
  4. Step 4: Simplify right side
    100,961.20x = 8,073,314,395.10
  5. Step 5: Solve for x
    x = 8,073,314,395.10/100,961.20
  6. Step 6: Final answer
    x = 79,964.52

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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.