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Finding the Fourth Proportional to 212,699.07, 319,054.79 and 79,553.92

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Solution

The fourth proportional to 212,699.07, 319,054.79 and 79,553.92 is: 119,333.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,699.07 : 319,054.79 = 79,553.92 : x
  2. Step 2: Convert to fraction form
    212,699.07/319,054.79 = 79,553.92/x
  3. Step 3: Cross multiply
    212,699.07x = 319,054.79 × 79,553.92
  4. Step 4: Simplify right side
    212,699.07x = 25,382,059,239.28
  5. Step 5: Solve for x
    x = 25,382,059,239.28/212,699.07
  6. Step 6: Final answer
    x = 119,333.19

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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.