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Finding the Fourth Proportional to 131,787.60, 197,695.80 and 127,640.40

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Solution

The fourth proportional to 131,787.60, 197,695.80 and 127,640.40 is: 191,474.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,787.60 : 197,695.80 = 127,640.40 : x
  2. Step 2: Convert to fraction form
    131,787.60/197,695.80 = 127,640.40/x
  3. Step 3: Cross multiply
    131,787.60x = 197,695.80 × 127,640.40
  4. Step 4: Simplify right side
    131,787.60x = 25,233,970,990.32
  5. Step 5: Solve for x
    x = 25,233,970,990.32/131,787.60
  6. Step 6: Final answer
    x = 191,474.55

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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.