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Finding the Fourth Proportional to 217,181.88, 299,708.10 and 121,690.44

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Solution

The fourth proportional to 217,181.88, 299,708.10 and 121,690.44 is: 167,931.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,181.88 : 299,708.10 = 121,690.44 : x
  2. Step 2: Convert to fraction form
    217,181.88/299,708.10 = 121,690.44/x
  3. Step 3: Cross multiply
    217,181.88x = 299,708.10 × 121,690.44
  4. Step 4: Simplify right side
    217,181.88x = 36,471,610,560.56
  5. Step 5: Solve for x
    x = 36,471,610,560.56/217,181.88
  6. Step 6: Final answer
    x = 167,931.19

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1.5x scale

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.