Home / 278,969.31-418,493.39-89,385.35

Finding the Fourth Proportional to 278,969.31, 418,493.39 and 89,385.35

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Solution

The fourth proportional to 278,969.31, 418,493.39 and 89,385.35 is: 134,090.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,969.31 : 418,493.39 = 89,385.35 : x
  2. Step 2: Convert to fraction form
    278,969.31/418,493.39 = 89,385.35/x
  3. Step 3: Cross multiply
    278,969.31x = 418,493.39 × 89,385.35
  4. Step 4: Simplify right side
    278,969.31x = 37,407,175,598.44
  5. Step 5: Solve for x
    x = 37,407,175,598.44/278,969.31
  6. Step 6: Final answer
    x = 134,090.65

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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.