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Finding the Fourth Proportional to 100,974.33, 139,338.90 and 55,652.17

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Solution

The fourth proportional to 100,974.33, 139,338.90 and 55,652.17 is: 76,796.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,974.33 : 139,338.90 = 55,652.17 : x
  2. Step 2: Convert to fraction form
    100,974.33/139,338.90 = 55,652.17/x
  3. Step 3: Cross multiply
    100,974.33x = 139,338.90 × 55,652.17
  4. Step 4: Simplify right side
    100,974.33x = 7,754,512,150.41
  5. Step 5: Solve for x
    x = 7,754,512,150.41/100,974.33
  6. Step 6: Final answer
    x = 76,796.87

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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.