Home / 278,766.18-418,165.16-79,070.87

Finding the Fourth Proportional to 278,766.18, 418,165.16 and 79,070.87

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Solution

The fourth proportional to 278,766.18, 418,165.16 and 79,070.87 is: 118,610.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,766.18 : 418,165.16 = 79,070.87 : x
  2. Step 2: Convert to fraction form
    278,766.18/418,165.16 = 79,070.87/x
  3. Step 3: Cross multiply
    278,766.18x = 418,165.16 × 79,070.87
  4. Step 4: Simplify right side
    278,766.18x = 33,064,683,789.66
  5. Step 5: Solve for x
    x = 33,064,683,789.66/278,766.18
  6. Step 6: Final answer
    x = 118,610.81

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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.