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Finding the Fourth Proportional to 247,069.70, 340,992.75 and 156,434.09

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Solution

The fourth proportional to 247,069.70, 340,992.75 and 156,434.09 is: 215,902.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,069.70 : 340,992.75 = 156,434.09 : x
  2. Step 2: Convert to fraction form
    247,069.70/340,992.75 = 156,434.09/x
  3. Step 3: Cross multiply
    247,069.70x = 340,992.75 × 156,434.09
  4. Step 4: Simplify right side
    247,069.70x = 53,342,888,837.88
  5. Step 5: Solve for x
    x = 53,342,888,837.88/247,069.70
  6. Step 6: Final answer
    x = 215,902.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.