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Finding the Fourth Proportional to 100,532.67, 138,729.58 and 55,216.59

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Solution

The fourth proportional to 100,532.67, 138,729.58 and 55,216.59 is: 76,195.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,532.67 : 138,729.58 = 55,216.59 : x
  2. Step 2: Convert to fraction form
    100,532.67/138,729.58 = 55,216.59/x
  3. Step 3: Cross multiply
    100,532.67x = 138,729.58 × 55,216.59
  4. Step 4: Simplify right side
    100,532.67x = 7,660,174,339.73
  5. Step 5: Solve for x
    x = 7,660,174,339.73/100,532.67
  6. Step 6: Final answer
    x = 76,195.87

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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.