Home / 100,160.52-138,228.17-57,721.78

Finding the Fourth Proportional to 100,160.52, 138,228.17 and 57,721.78

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Solution

The fourth proportional to 100,160.52, 138,228.17 and 57,721.78 is: 79,659.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,160.52 : 138,228.17 = 57,721.78 : x
  2. Step 2: Convert to fraction form
    100,160.52/138,228.17 = 57,721.78/x
  3. Step 3: Cross multiply
    100,160.52x = 138,228.17 × 57,721.78
  4. Step 4: Simplify right side
    100,160.52x = 7,978,776,018.54
  5. Step 5: Solve for x
    x = 7,978,776,018.54/100,160.52
  6. Step 6: Final answer
    x = 79,659.89

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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.