Home / 100,422.11-138,587.54-57,403.82

Finding the Fourth Proportional to 100,422.11, 138,587.54 and 57,403.82

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Solution

The fourth proportional to 100,422.11, 138,587.54 and 57,403.82 is: 79,220.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,422.11 : 138,587.54 = 57,403.82 : x
  2. Step 2: Convert to fraction form
    100,422.11/138,587.54 = 57,403.82/x
  3. Step 3: Cross multiply
    100,422.11x = 138,587.54 × 57,403.82
  4. Step 4: Simplify right side
    100,422.11x = 7,955,454,200.40
  5. Step 5: Solve for x
    x = 7,955,454,200.40/100,422.11
  6. Step 6: Final answer
    x = 79,220.15

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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.