Home / 278,822.81-418,233.40-79,143.37

Finding the Fourth Proportional to 278,822.81, 418,233.40 and 79,143.37

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Solution

The fourth proportional to 278,822.81, 418,233.40 and 79,143.37 is: 118,714.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,822.81 : 418,233.40 = 79,143.37 : x
  2. Step 2: Convert to fraction form
    278,822.81/418,233.40 = 79,143.37/x
  3. Step 3: Cross multiply
    278,822.81x = 418,233.40 × 79,143.37
  4. Step 4: Simplify right side
    278,822.81x = 33,100,399,479.12
  5. Step 5: Solve for x
    x = 33,100,399,479.12/278,822.81
  6. Step 6: Final answer
    x = 118,714.82

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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.