Home / 135,990.65-187,498.35-90,569.05

Finding the Fourth Proportional to 135,990.65, 187,498.35 and 90,569.05

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Solution

The fourth proportional to 135,990.65, 187,498.35 and 90,569.05 is: 124,872.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,990.65 : 187,498.35 = 90,569.05 : x
  2. Step 2: Convert to fraction form
    135,990.65/187,498.35 = 90,569.05/x
  3. Step 3: Cross multiply
    135,990.65x = 187,498.35 × 90,569.05
  4. Step 4: Simplify right side
    135,990.65x = 16,981,546,272.15
  5. Step 5: Solve for x
    x = 16,981,546,272.15/135,990.65
  6. Step 6: Final answer
    x = 124,872.90

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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.