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Finding the Fourth Proportional to 100,548.57, 138,758.75 and 55,228.46

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Solution

The fourth proportional to 100,548.57, 138,758.75 and 55,228.46 is: 76,216.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,548.57 : 138,758.75 = 55,228.46 : x
  2. Step 2: Convert to fraction form
    100,548.57/138,758.75 = 55,228.46/x
  3. Step 3: Cross multiply
    100,548.57x = 138,758.75 × 55,228.46
  4. Step 4: Simplify right side
    100,548.57x = 7,663,431,797.88
  5. Step 5: Solve for x
    x = 7,663,431,797.88/100,548.57
  6. Step 6: Final answer
    x = 76,216.22

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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.