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Finding the Fourth Proportional to 90,571.48, 135,848.58 and 28,207.96

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Solution

The fourth proportional to 90,571.48, 135,848.58 and 28,207.96 is: 42,309.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,571.48 : 135,848.58 = 28,207.96 : x
  2. Step 2: Convert to fraction form
    90,571.48/135,848.58 = 28,207.96/x
  3. Step 3: Cross multiply
    90,571.48x = 135,848.58 × 28,207.96
  4. Step 4: Simplify right side
    90,571.48x = 3,832,011,310.70
  5. Step 5: Solve for x
    x = 3,832,011,310.70/90,571.48
  6. Step 6: Final answer
    x = 42,309.25

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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.