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Finding the Fourth Proportional to 90,374.40, 135,561.60 and 28,044.90

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Solution

The fourth proportional to 90,374.40, 135,561.60 and 28,044.90 is: 42,067.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,374.40 : 135,561.60 = 28,044.90 : x
  2. Step 2: Convert to fraction form
    90,374.40/135,561.60 = 28,044.90/x
  3. Step 3: Cross multiply
    90,374.40x = 135,561.60 × 28,044.90
  4. Step 4: Simplify right side
    90,374.40x = 3,801,811,515.84
  5. Step 5: Solve for x
    x = 3,801,811,515.84/90,374.40
  6. Step 6: Final answer
    x = 42,067.35

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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.