Home / 278,557.65-417,538.26-128,623.41

Finding the Fourth Proportional to 278,557.65, 417,538.26 and 128,623.41

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Solution

The fourth proportional to 278,557.65, 417,538.26 and 128,623.41 is: 192,797.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,557.65 : 417,538.26 = 128,623.41 : x
  2. Step 2: Convert to fraction form
    278,557.65/417,538.26 = 128,623.41/x
  3. Step 3: Cross multiply
    278,557.65x = 417,538.26 × 128,623.41
  4. Step 4: Simplify right side
    278,557.65x = 53,705,194,806.67
  5. Step 5: Solve for x
    x = 53,705,194,806.67/278,557.65
  6. Step 6: Final answer
    x = 192,797.41

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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.