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Finding the Fourth Proportional to 171,760, 236,948.16 and 121,486.72

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Solution

The fourth proportional to 171,760, 236,948.16 and 121,486.72 is: 167,594.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,760 : 236,948.16 = 121,486.72 : x
  2. Step 2: Convert to fraction form
    171,760/236,948.16 = 121,486.72/x
  3. Step 3: Cross multiply
    171,760x = 236,948.16 × 121,486.72
  4. Step 4: Simplify right side
    171,760x = 28,786,054,768.44
  5. Step 5: Solve for x
    x = 28,786,054,768.44/171,760
  6. Step 6: Final answer
    x = 167,594.64

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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.