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Finding the Fourth Proportional to 217,520.64, 300,149.76 and 122,023.68

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Solution

The fourth proportional to 217,520.64, 300,149.76 and 122,023.68 is: 168,376.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,520.64 : 300,149.76 = 122,023.68 : x
  2. Step 2: Convert to fraction form
    217,520.64/300,149.76 = 122,023.68/x
  3. Step 3: Cross multiply
    217,520.64x = 300,149.76 × 122,023.68
  4. Step 4: Simplify right side
    217,520.64x = 36,625,378,266.32
  5. Step 5: Solve for x
    x = 36,625,378,266.32/217,520.64
  6. Step 6: Final answer
    x = 168,376.57

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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.