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Finding the Fourth Proportional to 157,659.46, 217,513.04 and 121,372

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Solution

The fourth proportional to 157,659.46, 217,513.04 and 121,372 is: 167,449.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,659.46 : 217,513.04 = 121,372 : x
  2. Step 2: Convert to fraction form
    157,659.46/217,513.04 = 121,372/x
  3. Step 3: Cross multiply
    157,659.46x = 217,513.04 × 121,372
  4. Step 4: Simplify right side
    157,659.46x = 26,399,992,690.88
  5. Step 5: Solve for x
    x = 26,399,992,690.88/157,659.46
  6. Step 6: Final answer
    x = 167,449.47

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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.