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Finding the Fourth Proportional to 90,805, 136,207.50 and 25,141

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Solution

The fourth proportional to 90,805, 136,207.50 and 25,141 is: 37,711.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,805 : 136,207.50 = 25,141 : x
  2. Step 2: Convert to fraction form
    90,805/136,207.50 = 25,141/x
  3. Step 3: Cross multiply
    90,805x = 136,207.50 × 25,141
  4. Step 4: Simplify right side
    90,805x = 3,424,392,757.50
  5. Step 5: Solve for x
    x = 3,424,392,757.50/90,805
  6. Step 6: Final answer
    x = 37,711.50

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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.