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Finding the Fourth Proportional to 202,472.20, 303,981.90 and 118,318.60

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Solution

The fourth proportional to 202,472.20, 303,981.90 and 118,318.60 is: 177,637.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,472.20 : 303,981.90 = 118,318.60 : x
  2. Step 2: Convert to fraction form
    202,472.20/303,981.90 = 118,318.60/x
  3. Step 3: Cross multiply
    202,472.20x = 303,981.90 × 118,318.60
  4. Step 4: Simplify right side
    202,472.20x = 35,966,712,833.34
  5. Step 5: Solve for x
    x = 35,966,712,833.34/202,472.20
  6. Step 6: Final answer
    x = 177,637.78

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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.