Home / 278,823.18-418,209.30-91,834.68

Finding the Fourth Proportional to 278,823.18, 418,209.30 and 91,834.68

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Solution

The fourth proportional to 278,823.18, 418,209.30 and 91,834.68 is: 137,743.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,823.18 : 418,209.30 = 91,834.68 : x
  2. Step 2: Convert to fraction form
    278,823.18/418,209.30 = 91,834.68/x
  3. Step 3: Cross multiply
    278,823.18x = 418,209.30 × 91,834.68
  4. Step 4: Simplify right side
    278,823.18x = 38,406,117,238.52
  5. Step 5: Solve for x
    x = 38,406,117,238.52/278,823.18
  6. Step 6: Final answer
    x = 137,743.63

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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.