Home / 100,531.29-138,733.35-55,212.20

Finding the Fourth Proportional to 100,531.29, 138,733.35 and 55,212.20

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Solution

The fourth proportional to 100,531.29, 138,733.35 and 55,212.20 is: 76,192.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,531.29 : 138,733.35 = 55,212.20 : x
  2. Step 2: Convert to fraction form
    100,531.29/138,733.35 = 55,212.20/x
  3. Step 3: Cross multiply
    100,531.29x = 138,733.35 × 55,212.20
  4. Step 4: Simplify right side
    100,531.29x = 7,659,772,773.20
  5. Step 5: Solve for x
    x = 7,659,772,773.20/100,531.29
  6. Step 6: Final answer
    x = 76,192.92

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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.