Home / 137,921.13-206,520.57-90,386.69

Finding the Fourth Proportional to 137,921.13, 206,520.57 and 90,386.69

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Solution

The fourth proportional to 137,921.13, 206,520.57 and 90,386.69 is: 135,343.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,921.13 : 206,520.57 = 90,386.69 : x
  2. Step 2: Convert to fraction form
    137,921.13/206,520.57 = 90,386.69/x
  3. Step 3: Cross multiply
    137,921.13x = 206,520.57 × 90,386.69
  4. Step 4: Simplify right side
    137,921.13x = 18,666,709,706.61
  5. Step 5: Solve for x
    x = 18,666,709,706.61/137,921.13
  6. Step 6: Final answer
    x = 135,343.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.