Home / 99,997.76-137,991.84-55,277.12

Finding the Fourth Proportional to 99,997.76, 137,991.84 and 55,277.12

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Solution

The fourth proportional to 99,997.76, 137,991.84 and 55,277.12 is: 76,279.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,997.76 : 137,991.84 = 55,277.12 : x
  2. Step 2: Convert to fraction form
    99,997.76/137,991.84 = 55,277.12/x
  3. Step 3: Cross multiply
    99,997.76x = 137,991.84 × 55,277.12
  4. Step 4: Simplify right side
    99,997.76x = 7,627,791,498.70
  5. Step 5: Solve for x
    x = 7,627,791,498.70/99,997.76
  6. Step 6: Final answer
    x = 76,279.62

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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.