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Finding the Fourth Proportional to 212,760.92, 319,149.48 and 79,627.16

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Solution

The fourth proportional to 212,760.92, 319,149.48 and 79,627.16 is: 119,443.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,760.92 : 319,149.48 = 79,627.16 : x
  2. Step 2: Convert to fraction form
    212,760.92/319,149.48 = 79,627.16/x
  3. Step 3: Cross multiply
    212,760.92x = 319,149.48 × 79,627.16
  4. Step 4: Simplify right side
    212,760.92x = 25,412,966,707.88
  5. Step 5: Solve for x
    x = 25,412,966,707.88/212,760.92
  6. Step 6: Final answer
    x = 119,443.77

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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.