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Finding the Fourth Proportional to 90,906, 136,380.96 and 28,576.32

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Solution

The fourth proportional to 90,906, 136,380.96 and 28,576.32 is: 42,871.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,906 : 136,380.96 = 28,576.32 : x
  2. Step 2: Convert to fraction form
    90,906/136,380.96 = 28,576.32/x
  3. Step 3: Cross multiply
    90,906x = 136,380.96 × 28,576.32
  4. Step 4: Simplify right side
    90,906x = 3,897,265,954.87
  5. Step 5: Solve for x
    x = 3,897,265,954.87/90,906
  6. Step 6: Final answer
    x = 42,871.38

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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.