Home / 101,103.29-139,521.66-55,781.68

Finding the Fourth Proportional to 101,103.29, 139,521.66 and 55,781.68

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Solution

The fourth proportional to 101,103.29, 139,521.66 and 55,781.68 is: 76,978.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,103.29 : 139,521.66 = 55,781.68 : x
  2. Step 2: Convert to fraction form
    101,103.29/139,521.66 = 55,781.68/x
  3. Step 3: Cross multiply
    101,103.29x = 139,521.66 × 55,781.68
  4. Step 4: Simplify right side
    101,103.29x = 7,782,752,591.19
  5. Step 5: Solve for x
    x = 7,782,752,591.19/101,103.29
  6. Step 6: Final answer
    x = 76,978.23

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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.