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Finding the Fourth Proportional to 212,773.92, 319,168.98 and 79,640.16

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Solution

The fourth proportional to 212,773.92, 319,168.98 and 79,640.16 is: 119,463.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,773.92 : 319,168.98 = 79,640.16 : x
  2. Step 2: Convert to fraction form
    212,773.92/319,168.98 = 79,640.16/x
  3. Step 3: Cross multiply
    212,773.92x = 319,168.98 × 79,640.16
  4. Step 4: Simplify right side
    212,773.92x = 25,418,668,634.24
  5. Step 5: Solve for x
    x = 25,418,668,634.24/212,773.92
  6. Step 6: Final answer
    x = 119,463.27

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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.