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Finding the Fourth Proportional to 215,531.91, 323,220.06 and 90,882.63

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Solution

The fourth proportional to 215,531.91, 323,220.06 and 90,882.63 is: 136,291.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,531.91 : 323,220.06 = 90,882.63 : x
  2. Step 2: Convert to fraction form
    215,531.91/323,220.06 = 90,882.63/x
  3. Step 3: Cross multiply
    215,531.91x = 323,220.06 × 90,882.63
  4. Step 4: Simplify right side
    215,531.91x = 29,375,089,121.56
  5. Step 5: Solve for x
    x = 29,375,089,121.56/215,531.91
  6. Step 6: Final answer
    x = 136,291.14

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1.5x scale

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.