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Finding the Fourth Proportional to 90,650.54, 135,837.30 and 38,031.32

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Solution

The fourth proportional to 90,650.54, 135,837.30 and 38,031.32 is: 56,988.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,650.54 : 135,837.30 = 38,031.32 : x
  2. Step 2: Convert to fraction form
    90,650.54/135,837.30 = 38,031.32/x
  3. Step 3: Cross multiply
    90,650.54x = 135,837.30 × 38,031.32
  4. Step 4: Simplify right side
    90,650.54x = 5,166,072,306.45
  5. Step 5: Solve for x
    x = 5,166,072,306.45/90,650.54
  6. Step 6: Final answer
    x = 56,988.87

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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.