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Finding the Fourth Proportional to 217,677.64, 300,378.66 and 122,165.92

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Solution

The fourth proportional to 217,677.64, 300,378.66 and 122,165.92 is: 168,579.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,677.64 : 300,378.66 = 122,165.92 : x
  2. Step 2: Convert to fraction form
    217,677.64/300,378.66 = 122,165.92/x
  3. Step 3: Cross multiply
    217,677.64x = 300,378.66 × 122,165.92
  4. Step 4: Simplify right side
    217,677.64x = 36,696,035,347.27
  5. Step 5: Solve for x
    x = 36,696,035,347.27/217,677.64
  6. Step 6: Final answer
    x = 168,579.72

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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.