Home / 100,744.16-139,028.64-55,425.92

Finding the Fourth Proportional to 100,744.16, 139,028.64 and 55,425.92

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Solution

The fourth proportional to 100,744.16, 139,028.64 and 55,425.92 is: 76,488.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,744.16 : 139,028.64 = 55,425.92 : x
  2. Step 2: Convert to fraction form
    100,744.16/139,028.64 = 55,425.92/x
  3. Step 3: Cross multiply
    100,744.16x = 139,028.64 × 55,425.92
  4. Step 4: Simplify right side
    100,744.16x = 7,705,790,278.35
  5. Step 5: Solve for x
    x = 7,705,790,278.35/100,744.16
  6. Step 6: Final answer
    x = 76,488.70

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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.