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Finding the Fourth Proportional to 212,754.50, 319,186.44 and 79,636.68

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Solution

The fourth proportional to 212,754.50, 319,186.44 and 79,636.68 is: 119,475.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,754.50 : 319,186.44 = 79,636.68 : x
  2. Step 2: Convert to fraction form
    212,754.50/319,186.44 = 79,636.68/x
  3. Step 3: Cross multiply
    212,754.50x = 319,186.44 × 79,636.68
  4. Step 4: Simplify right side
    212,754.50x = 25,418,948,382.62
  5. Step 5: Solve for x
    x = 25,418,948,382.62/212,754.50
  6. Step 6: Final answer
    x = 119,475.49

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1.5x scale

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.