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Finding the Fourth Proportional to 90,125, 135,268.75 and 48,040.13

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Solution

The fourth proportional to 90,125, 135,268.75 and 48,040.13 is: 72,103.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,125 : 135,268.75 = 48,040.13 : x
  2. Step 2: Convert to fraction form
    90,125/135,268.75 = 48,040.13/x
  3. Step 3: Cross multiply
    90,125x = 135,268.75 × 48,040.13
  4. Step 4: Simplify right side
    90,125x = 6,498,328,334.94
  5. Step 5: Solve for x
    x = 6,498,328,334.94/90,125
  6. Step 6: Final answer
    x = 72,103.50

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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.