Home / 100,726.13-138,999.16-55,404.11

Finding the Fourth Proportional to 100,726.13, 138,999.16 and 55,404.11

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Solution

The fourth proportional to 100,726.13, 138,999.16 and 55,404.11 is: 76,456.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,726.13 : 138,999.16 = 55,404.11 : x
  2. Step 2: Convert to fraction form
    100,726.13/138,999.16 = 55,404.11/x
  3. Step 3: Cross multiply
    100,726.13x = 138,999.16 × 55,404.11
  4. Step 4: Simplify right side
    100,726.13x = 7,701,125,098.05
  5. Step 5: Solve for x
    x = 7,701,125,098.05/100,726.13
  6. Step 6: Final answer
    x = 76,456.08

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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.