Home / 109,489.40-150,961.14-90,040.36

Finding the Fourth Proportional to 109,489.40, 150,961.14 and 90,040.36

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Solution

The fourth proportional to 109,489.40, 150,961.14 and 90,040.36 is: 124,145.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,489.40 : 150,961.14 = 90,040.36 : x
  2. Step 2: Convert to fraction form
    109,489.40/150,961.14 = 90,040.36/x
  3. Step 3: Cross multiply
    109,489.40x = 150,961.14 × 90,040.36
  4. Step 4: Simplify right side
    109,489.40x = 13,592,595,391.61
  5. Step 5: Solve for x
    x = 13,592,595,391.61/109,489.40
  6. Step 6: Final answer
    x = 124,145.31

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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.