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Finding the Fourth Proportional to 212,697.69, 319,052.72 and 79,552.55

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Solution

The fourth proportional to 212,697.69, 319,052.72 and 79,552.55 is: 119,331.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,697.69 : 319,052.72 = 79,552.55 : x
  2. Step 2: Convert to fraction form
    212,697.69/319,052.72 = 79,552.55/x
  3. Step 3: Cross multiply
    212,697.69x = 319,052.72 × 79,552.55
  4. Step 4: Simplify right side
    212,697.69x = 25,381,456,064.05
  5. Step 5: Solve for x
    x = 25,381,456,064.05/212,697.69
  6. Step 6: Final answer
    x = 119,331.13

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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.