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Finding the Fourth Proportional to 420,696.38, 631,044.57 and 125,208.38

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Solution

The fourth proportional to 420,696.38, 631,044.57 and 125,208.38 is: 187,812.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,696.38 : 631,044.57 = 125,208.38 : x
  2. Step 2: Convert to fraction form
    420,696.38/631,044.57 = 125,208.38/x
  3. Step 3: Cross multiply
    420,696.38x = 631,044.57 × 125,208.38
  4. Step 4: Simplify right side
    420,696.38x = 79,012,065,162.27
  5. Step 5: Solve for x
    x = 79,012,065,162.27/420,696.38
  6. Step 6: Final answer
    x = 187,812.56

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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.