Home / 278,835.93-418,253.03-79,156.45

Finding the Fourth Proportional to 278,835.93, 418,253.03 and 79,156.45

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Solution

The fourth proportional to 278,835.93, 418,253.03 and 79,156.45 is: 118,734.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,835.93 : 418,253.03 = 79,156.45 : x
  2. Step 2: Convert to fraction form
    278,835.93/418,253.03 = 79,156.45/x
  3. Step 3: Cross multiply
    278,835.93x = 418,253.03 × 79,156.45
  4. Step 4: Simplify right side
    278,835.93x = 33,107,425,480.41
  5. Step 5: Solve for x
    x = 33,107,425,480.41/278,835.93
  6. Step 6: Final answer
    x = 118,734.43

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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.