Home / 278,905.03-418,385.23-89,317.78

Finding the Fourth Proportional to 278,905.03, 418,385.23 and 89,317.78

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Solution

The fourth proportional to 278,905.03, 418,385.23 and 89,317.78 is: 133,985.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,905.03 : 418,385.23 = 89,317.78 : x
  2. Step 2: Convert to fraction form
    278,905.03/418,385.23 = 89,317.78/x
  3. Step 3: Cross multiply
    278,905.03x = 418,385.23 × 89,317.78
  4. Step 4: Simplify right side
    278,905.03x = 37,369,238,659.13
  5. Step 5: Solve for x
    x = 37,369,238,659.13/278,905.03
  6. Step 6: Final answer
    x = 133,985.53

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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.