Home / 100,966.10-139,334.16-55,645.70

Finding the Fourth Proportional to 100,966.10, 139,334.16 and 55,645.70

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Solution

The fourth proportional to 100,966.10, 139,334.16 and 55,645.70 is: 76,791.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,966.10 : 139,334.16 = 55,645.70 : x
  2. Step 2: Convert to fraction form
    100,966.10/139,334.16 = 55,645.70/x
  3. Step 3: Cross multiply
    100,966.10x = 139,334.16 × 55,645.70
  4. Step 4: Simplify right side
    100,966.10x = 7,753,346,867.11
  5. Step 5: Solve for x
    x = 7,753,346,867.11/100,966.10
  6. Step 6: Final answer
    x = 76,791.59

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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.