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Finding the Fourth Proportional to 315,267.12, 435,065.01 and 172,029.54

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Solution

The fourth proportional to 315,267.12, 435,065.01 and 172,029.54 is: 237,398.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,267.12 : 435,065.01 = 172,029.54 : x
  2. Step 2: Convert to fraction form
    315,267.12/435,065.01 = 172,029.54/x
  3. Step 3: Cross multiply
    315,267.12x = 435,065.01 × 172,029.54
  4. Step 4: Simplify right side
    315,267.12x = 74,844,033,540.40
  5. Step 5: Solve for x
    x = 74,844,033,540.40/315,267.12
  6. Step 6: Final answer
    x = 237,398.79

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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.