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Finding the Fourth Proportional to 139,449.56, 192,441.87 and 75,787.35

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Solution

The fourth proportional to 139,449.56, 192,441.87 and 75,787.35 is: 104,587.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,449.56 : 192,441.87 = 75,787.35 : x
  2. Step 2: Convert to fraction form
    139,449.56/192,441.87 = 75,787.35/x
  3. Step 3: Cross multiply
    139,449.56x = 192,441.87 × 75,787.35
  4. Step 4: Simplify right side
    139,449.56x = 14,584,659,356.34
  5. Step 5: Solve for x
    x = 14,584,659,356.34/139,449.56
  6. Step 6: Final answer
    x = 104,587.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.