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Finding the Fourth Proportional to 90,850.60, 136,282.38 and 31,668.76

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Solution

The fourth proportional to 90,850.60, 136,282.38 and 31,668.76 is: 47,505.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,850.60 : 136,282.38 = 31,668.76 : x
  2. Step 2: Convert to fraction form
    90,850.60/136,282.38 = 31,668.76/x
  3. Step 3: Cross multiply
    90,850.60x = 136,282.38 × 31,668.76
  4. Step 4: Simplify right side
    90,850.60x = 4,315,893,984.45
  5. Step 5: Solve for x
    x = 4,315,893,984.45/90,850.60
  6. Step 6: Final answer
    x = 47,505.40

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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.