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Finding the Fourth Proportional to 315,268.97, 435,081.68 and 172,036.87

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Solution

The fourth proportional to 315,268.97, 435,081.68 and 172,036.87 is: 237,416.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,268.97 : 435,081.68 = 172,036.87 : x
  2. Step 2: Convert to fraction form
    315,268.97/435,081.68 = 172,036.87/x
  3. Step 3: Cross multiply
    315,268.97x = 435,081.68 × 172,036.87
  4. Step 4: Simplify right side
    315,268.97x = 74,850,090,421.54
  5. Step 5: Solve for x
    x = 74,850,090,421.54/315,268.97
  6. Step 6: Final answer
    x = 237,416.61

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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.