Home / 278,818.21-418,235.51-68,456.13

Finding the Fourth Proportional to 278,818.21, 418,235.51 and 68,456.13

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Solution

The fourth proportional to 278,818.21, 418,235.51 and 68,456.13 is: 102,686.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,818.21 : 418,235.51 = 68,456.13 : x
  2. Step 2: Convert to fraction form
    278,818.21/418,235.51 = 68,456.13/x
  3. Step 3: Cross multiply
    278,818.21x = 418,235.51 × 68,456.13
  4. Step 4: Simplify right side
    278,818.21x = 28,630,784,443.18
  5. Step 5: Solve for x
    x = 28,630,784,443.18/278,818.21
  6. Step 6: Final answer
    x = 102,686.21

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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.