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Finding the Fourth Proportional to 90,963.60, 136,432.44 and 28,626

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Solution

The fourth proportional to 90,963.60, 136,432.44 and 28,626 is: 42,934.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,963.60 : 136,432.44 = 28,626 : x
  2. Step 2: Convert to fraction form
    90,963.60/136,432.44 = 28,626/x
  3. Step 3: Cross multiply
    90,963.60x = 136,432.44 × 28,626
  4. Step 4: Simplify right side
    90,963.60x = 3,905,515,027.44
  5. Step 5: Solve for x
    x = 3,905,515,027.44/90,963.60
  6. Step 6: Final answer
    x = 42,934.92

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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.