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Finding the Fourth Proportional to 444,685.84, 667,047.32 and 129,142.80

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Solution

The fourth proportional to 444,685.84, 667,047.32 and 129,142.80 is: 193,719.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    444,685.84 : 667,047.32 = 129,142.80 : x
  2. Step 2: Convert to fraction form
    444,685.84/667,047.32 = 129,142.80/x
  3. Step 3: Cross multiply
    444,685.84x = 667,047.32 × 129,142.80
  4. Step 4: Simplify right side
    444,685.84x = 86,144,358,637.30
  5. Step 5: Solve for x
    x = 86,144,358,637.30/444,685.84
  6. Step 6: Final answer
    x = 193,719.59

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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.