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Finding the Fourth Proportional to 217,390.59, 299,871.92 and 136,690.35

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Solution

The fourth proportional to 217,390.59, 299,871.92 and 136,690.35 is: 188,552.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,390.59 : 299,871.92 = 136,690.35 : x
  2. Step 2: Convert to fraction form
    217,390.59/299,871.92 = 136,690.35/x
  3. Step 3: Cross multiply
    217,390.59x = 299,871.92 × 136,690.35
  4. Step 4: Simplify right side
    217,390.59x = 40,989,597,016.52
  5. Step 5: Solve for x
    x = 40,989,597,016.52/217,390.59
  6. Step 6: Final answer
    x = 188,552.77

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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.