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Finding the Fourth Proportional to 217,896.81, 300,697.77 and 122,403.57

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Solution

The fourth proportional to 217,896.81, 300,697.77 and 122,403.57 is: 168,917.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,896.81 : 300,697.77 = 122,403.57 : x
  2. Step 2: Convert to fraction form
    217,896.81/300,697.77 = 122,403.57/x
  3. Step 3: Cross multiply
    217,896.81x = 300,697.77 × 122,403.57
  4. Step 4: Simplify right side
    217,896.81x = 36,806,480,539.04
  5. Step 5: Solve for x
    x = 36,806,480,539.04/217,896.81
  6. Step 6: Final answer
    x = 168,917.02

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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.