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Finding the Fourth Proportional to 172,820.80, 259,231.20 and 162,979.30

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Solution

The fourth proportional to 172,820.80, 259,231.20 and 162,979.30 is: 244,468.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,820.80 : 259,231.20 = 162,979.30 : x
  2. Step 2: Convert to fraction form
    172,820.80/259,231.20 = 162,979.30/x
  3. Step 3: Cross multiply
    172,820.80x = 259,231.20 × 162,979.30
  4. Step 4: Simplify right side
    172,820.80x = 42,249,319,514.16
  5. Step 5: Solve for x
    x = 42,249,319,514.16/172,820.80
  6. Step 6: Final answer
    x = 244,468.95

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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.