Home / 100,573.20-138,791.40-55,254.84

Finding the Fourth Proportional to 100,573.20, 138,791.40 and 55,254.84

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Solution

The fourth proportional to 100,573.20, 138,791.40 and 55,254.84 is: 76,251.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,573.20 : 138,791.40 = 55,254.84 : x
  2. Step 2: Convert to fraction form
    100,573.20/138,791.40 = 55,254.84/x
  3. Step 3: Cross multiply
    100,573.20x = 138,791.40 × 55,254.84
  4. Step 4: Simplify right side
    100,573.20x = 7,668,896,600.38
  5. Step 5: Solve for x
    x = 7,668,896,600.38/100,573.20
  6. Step 6: Final answer
    x = 76,251.89

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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.