Home / 100,427.68-138,590.10-55,105.92

Finding the Fourth Proportional to 100,427.68, 138,590.10 and 55,105.92

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Solution

The fourth proportional to 100,427.68, 138,590.10 and 55,105.92 is: 76,046.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,427.68 : 138,590.10 = 55,105.92 : x
  2. Step 2: Convert to fraction form
    100,427.68/138,590.10 = 55,105.92/x
  3. Step 3: Cross multiply
    100,427.68x = 138,590.10 × 55,105.92
  4. Step 4: Simplify right side
    100,427.68x = 7,637,134,963.39
  5. Step 5: Solve for x
    x = 7,637,134,963.39/100,427.68
  6. Step 6: Final answer
    x = 76,046.12

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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.