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Finding the Fourth Proportional to 221,075.01, 331,682.61 and 78,917.24

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Solution

The fourth proportional to 221,075.01, 331,682.61 and 78,917.24 is: 118,400.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,075.01 : 331,682.61 = 78,917.24 : x
  2. Step 2: Convert to fraction form
    221,075.01/331,682.61 = 78,917.24/x
  3. Step 3: Cross multiply
    221,075.01x = 331,682.61 × 78,917.24
  4. Step 4: Simplify right side
    221,075.01x = 26,175,476,362.86
  5. Step 5: Solve for x
    x = 26,175,476,362.86/221,075.01
  6. Step 6: Final answer
    x = 118,400.88

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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.