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Finding the Fourth Proportional to 90,952.48, 136,422.06 and 28,640.80

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Solution

The fourth proportional to 90,952.48, 136,422.06 and 28,640.80 is: 42,959.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,952.48 : 136,422.06 = 28,640.80 : x
  2. Step 2: Convert to fraction form
    90,952.48/136,422.06 = 28,640.80/x
  3. Step 3: Cross multiply
    90,952.48x = 136,422.06 × 28,640.80
  4. Step 4: Simplify right side
    90,952.48x = 3,907,236,936.05
  5. Step 5: Solve for x
    x = 3,907,236,936.05/90,952.48
  6. Step 6: Final answer
    x = 42,959.10

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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.