Home / 278,107.50-417,174.21-81,115.50

Finding the Fourth Proportional to 278,107.50, 417,174.21 and 81,115.50

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Solution

The fourth proportional to 278,107.50, 417,174.21 and 81,115.50 is: 121,677.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,107.50 : 417,174.21 = 81,115.50 : x
  2. Step 2: Convert to fraction form
    278,107.50/417,174.21 = 81,115.50/x
  3. Step 3: Cross multiply
    278,107.50x = 417,174.21 × 81,115.50
  4. Step 4: Simplify right side
    278,107.50x = 33,839,294,631.26
  5. Step 5: Solve for x
    x = 33,839,294,631.26/278,107.50
  6. Step 6: Final answer
    x = 121,677.03

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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.