Home / 100,040.82-138,040.98-57,591.12

Finding the Fourth Proportional to 100,040.82, 138,040.98 and 57,591.12

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Solution

The fourth proportional to 100,040.82, 138,040.98 and 57,591.12 is: 79,466.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,040.82 : 138,040.98 = 57,591.12 : x
  2. Step 2: Convert to fraction form
    100,040.82/138,040.98 = 57,591.12/x
  3. Step 3: Cross multiply
    100,040.82x = 138,040.98 × 57,591.12
  4. Step 4: Simplify right side
    100,040.82x = 7,949,934,644.10
  5. Step 5: Solve for x
    x = 7,949,934,644.10/100,040.82
  6. Step 6: Final answer
    x = 79,466.91

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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.