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Finding the Fourth Proportional to 212,698.44, 319,053.86 and 79,553.30

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Solution

The fourth proportional to 212,698.44, 319,053.86 and 79,553.30 is: 119,332.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,698.44 : 319,053.86 = 79,553.30 : x
  2. Step 2: Convert to fraction form
    212,698.44/319,053.86 = 79,553.30/x
  3. Step 3: Cross multiply
    212,698.44x = 319,053.86 × 79,553.30
  4. Step 4: Simplify right side
    212,698.44x = 25,381,785,447.70
  5. Step 5: Solve for x
    x = 25,381,785,447.70/212,698.44
  6. Step 6: Final answer
    x = 119,332.26

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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.