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Finding the Fourth Proportional to 90,902.64, 136,363.29 and 34,789.95

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Solution

The fourth proportional to 90,902.64, 136,363.29 and 34,789.95 is: 52,188.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,902.64 : 136,363.29 = 34,789.95 : x
  2. Step 2: Convert to fraction form
    90,902.64/136,363.29 = 34,789.95/x
  3. Step 3: Cross multiply
    90,902.64x = 136,363.29 × 34,789.95
  4. Step 4: Simplify right side
    90,902.64x = 4,744,072,040.94
  5. Step 5: Solve for x
    x = 4,744,072,040.94/90,902.64
  6. Step 6: Final answer
    x = 52,188.50

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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.