Home / 149,013.38-205,640.91-81,031.70

Finding the Fourth Proportional to 149,013.38, 205,640.91 and 81,031.70

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Solution

The fourth proportional to 149,013.38, 205,640.91 and 81,031.70 is: 111,825.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,013.38 : 205,640.91 = 81,031.70 : x
  2. Step 2: Convert to fraction form
    149,013.38/205,640.91 = 81,031.70/x
  3. Step 3: Cross multiply
    149,013.38x = 205,640.91 × 81,031.70
  4. Step 4: Simplify right side
    149,013.38x = 16,663,433,040.95
  5. Step 5: Solve for x
    x = 16,663,433,040.95/149,013.38
  6. Step 6: Final answer
    x = 111,825.08

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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.