Home / 278,784.41-418,113.57-128,942.48

Finding the Fourth Proportional to 278,784.41, 418,113.57 and 128,942.48

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Solution

The fourth proportional to 278,784.41, 418,113.57 and 128,942.48 is: 193,384.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,784.41 : 418,113.57 = 128,942.48 : x
  2. Step 2: Convert to fraction form
    278,784.41/418,113.57 = 128,942.48/x
  3. Step 3: Cross multiply
    278,784.41x = 418,113.57 × 128,942.48
  4. Step 4: Simplify right side
    278,784.41x = 53,912,600,637.45
  5. Step 5: Solve for x
    x = 53,912,600,637.45/278,784.41
  6. Step 6: Final answer
    x = 193,384.56

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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.