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Finding the Fourth Proportional to 115,278.20, 172,917.30 and 115,278.20

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Solution

The fourth proportional to 115,278.20, 172,917.30 and 115,278.20 is: 172,917.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,278.20 : 172,917.30 = 115,278.20 : x
  2. Step 2: Convert to fraction form
    115,278.20/172,917.30 = 115,278.20/x
  3. Step 3: Cross multiply
    115,278.20x = 172,917.30 × 115,278.20
  4. Step 4: Simplify right side
    115,278.20x = 19,933,595,092.86
  5. Step 5: Solve for x
    x = 19,933,595,092.86/115,278.20
  6. Step 6: Final answer
    x = 172,917.30

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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.