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Finding the Fourth Proportional to 90,618.72, 135,721.07 and 43,267.10

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Solution

The fourth proportional to 90,618.72, 135,721.07 and 43,267.10 is: 64,801.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,618.72 : 135,721.07 = 43,267.10 : x
  2. Step 2: Convert to fraction form
    90,618.72/135,721.07 = 43,267.10/x
  3. Step 3: Cross multiply
    90,618.72x = 135,721.07 × 43,267.10
  4. Step 4: Simplify right side
    90,618.72x = 5,872,256,375.11
  5. Step 5: Solve for x
    x = 5,872,256,375.11/90,618.72
  6. Step 6: Final answer
    x = 64,801.80

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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.