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Finding the Fourth Proportional to 65,787.39, 98,690.67 and 20,793.51

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Solution

The fourth proportional to 65,787.39, 98,690.67 and 20,793.51 is: 31,193.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,787.39 : 98,690.67 = 20,793.51 : x
  2. Step 2: Convert to fraction form
    65,787.39/98,690.67 = 20,793.51/x
  3. Step 3: Cross multiply
    65,787.39x = 98,690.67 × 20,793.51
  4. Step 4: Simplify right side
    65,787.39x = 2,052,125,433.55
  5. Step 5: Solve for x
    x = 2,052,125,433.55/65,787.39
  6. Step 6: Final answer
    x = 31,193.29

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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.