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Finding the Fourth Proportional to 90,668.30, 135,869.34 and 45,627.72

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Solution

The fourth proportional to 90,668.30, 135,869.34 and 45,627.72 is: 68,374.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,668.30 : 135,869.34 = 45,627.72 : x
  2. Step 2: Convert to fraction form
    90,668.30/135,869.34 = 45,627.72/x
  3. Step 3: Cross multiply
    90,668.30x = 135,869.34 × 45,627.72
  4. Step 4: Simplify right side
    90,668.30x = 6,199,408,202.10
  5. Step 5: Solve for x
    x = 6,199,408,202.10/90,668.30
  6. Step 6: Final answer
    x = 68,374.59

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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.