Home / 278,321.19-417,419.82-78,660.24

Finding the Fourth Proportional to 278,321.19, 417,419.82 and 78,660.24

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Solution

The fourth proportional to 278,321.19, 417,419.82 and 78,660.24 is: 117,972.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,321.19 : 417,419.82 = 78,660.24 : x
  2. Step 2: Convert to fraction form
    278,321.19/417,419.82 = 78,660.24/x
  3. Step 3: Cross multiply
    278,321.19x = 417,419.82 × 78,660.24
  4. Step 4: Simplify right side
    278,321.19x = 32,834,343,221.96
  5. Step 5: Solve for x
    x = 32,834,343,221.96/278,321.19
  6. Step 6: Final answer
    x = 117,972.85

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1.5x scale

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.