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Finding the Fourth Proportional to 90,576.88, 135,819.08 and 53,209.94

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Solution

The fourth proportional to 90,576.88, 135,819.08 and 53,209.94 is: 79,787.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,576.88 : 135,819.08 = 53,209.94 : x
  2. Step 2: Convert to fraction form
    90,576.88/135,819.08 = 53,209.94/x
  3. Step 3: Cross multiply
    90,576.88x = 135,819.08 × 53,209.94
  4. Step 4: Simplify right side
    90,576.88x = 7,226,924,734.04
  5. Step 5: Solve for x
    x = 7,226,924,734.04/90,576.88
  6. Step 6: Final answer
    x = 79,787.74

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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.