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Finding the Fourth Proportional to 168,075.45, 251,621.10 and 111,978.90

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Solution

The fourth proportional to 168,075.45, 251,621.10 and 111,978.90 is: 167,640.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,075.45 : 251,621.10 = 111,978.90 : x
  2. Step 2: Convert to fraction form
    168,075.45/251,621.10 = 111,978.90/x
  3. Step 3: Cross multiply
    168,075.45x = 251,621.10 × 111,978.90
  4. Step 4: Simplify right side
    168,075.45x = 28,176,253,994.79
  5. Step 5: Solve for x
    x = 28,176,253,994.79/168,075.45
  6. Step 6: Final answer
    x = 167,640.51

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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.