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Finding the Fourth Proportional to 212,714.84, 319,127.61 and 79,605.38

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Solution

The fourth proportional to 212,714.84, 319,127.61 and 79,605.38 is: 119,428.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,714.84 : 319,127.61 = 79,605.38 : x
  2. Step 2: Convert to fraction form
    212,714.84/319,127.61 = 79,605.38/x
  3. Step 3: Cross multiply
    212,714.84x = 319,127.61 × 79,605.38
  4. Step 4: Simplify right side
    212,714.84x = 25,404,275,758.88
  5. Step 5: Solve for x
    x = 25,404,275,758.88/212,714.84
  6. Step 6: Final answer
    x = 119,428.79

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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.