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Finding the Fourth Proportional to 278,833.02, 418,274.73 and 79,155.42

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Solution

The fourth proportional to 278,833.02, 418,274.73 and 79,155.42 is: 118,740.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,833.02 : 418,274.73 = 79,155.42 : x
  2. Step 2: Convert to fraction form
    278,833.02/418,274.73 = 79,155.42/x
  3. Step 3: Cross multiply
    278,833.02x = 418,274.73 × 79,155.42
  4. Step 4: Simplify right side
    278,833.02x = 33,108,711,928.54
  5. Step 5: Solve for x
    x = 33,108,711,928.54/278,833.02
  6. Step 6: Final answer
    x = 118,740.28

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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.