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Finding the Fourth Proportional to 197,687.20, 296,761.20 and 118,890.40

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Solution

The fourth proportional to 197,687.20, 296,761.20 and 118,890.40 is: 178,474.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    197,687.20 : 296,761.20 = 118,890.40 : x
  2. Step 2: Convert to fraction form
    197,687.20/296,761.20 = 118,890.40/x
  3. Step 3: Cross multiply
    197,687.20x = 296,761.20 × 118,890.40
  4. Step 4: Simplify right side
    197,687.20x = 35,282,057,772.48
  5. Step 5: Solve for x
    x = 35,282,057,772.48/197,687.20
  6. Step 6: Final answer
    x = 178,474.16

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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.