Home / 278,927.60-418,327.80-79,243.76

Finding the Fourth Proportional to 278,927.60, 418,327.80 and 79,243.76

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Solution

The fourth proportional to 278,927.60, 418,327.80 and 79,243.76 is: 118,847.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,927.60 : 418,327.80 = 79,243.76 : x
  2. Step 2: Convert to fraction form
    278,927.60/418,327.80 = 79,243.76/x
  3. Step 3: Cross multiply
    278,927.60x = 418,327.80 × 79,243.76
  4. Step 4: Simplify right side
    278,927.60x = 33,149,867,784.53
  5. Step 5: Solve for x
    x = 33,149,867,784.53/278,927.60
  6. Step 6: Final answer
    x = 118,847.57

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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.