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Finding the Fourth Proportional to 108,820.87, 150,179.47 and 61,074.20

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Solution

The fourth proportional to 108,820.87, 150,179.47 and 61,074.20 is: 84,286.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,820.87 : 150,179.47 = 61,074.20 : x
  2. Step 2: Convert to fraction form
    108,820.87/150,179.47 = 61,074.20/x
  3. Step 3: Cross multiply
    108,820.87x = 150,179.47 × 61,074.20
  4. Step 4: Simplify right side
    108,820.87x = 9,172,091,209.44
  5. Step 5: Solve for x
    x = 9,172,091,209.44/108,820.87
  6. Step 6: Final answer
    x = 84,286.14

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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.