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Finding the Fourth Proportional to 280,071.12, 386,568 and 166,872

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Solution

The fourth proportional to 280,071.12, 386,568 and 166,872 is: 230,324.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,071.12 : 386,568 = 166,872 : x
  2. Step 2: Convert to fraction form
    280,071.12/386,568 = 166,872/x
  3. Step 3: Cross multiply
    280,071.12x = 386,568 × 166,872
  4. Step 4: Simplify right side
    280,071.12x = 64,507,375,296
  5. Step 5: Solve for x
    x = 64,507,375,296/280,071.12
  6. Step 6: Final answer
    x = 230,324.98

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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.