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Finding the Fourth Proportional to 215,616.32, 323,288.76 and 65,806.76

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Solution

The fourth proportional to 215,616.32, 323,288.76 and 65,806.76 is: 98,668.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,616.32 : 323,288.76 = 65,806.76 : x
  2. Step 2: Convert to fraction form
    215,616.32/323,288.76 = 65,806.76/x
  3. Step 3: Cross multiply
    215,616.32x = 323,288.76 × 65,806.76
  4. Step 4: Simplify right side
    215,616.32x = 21,274,585,840.02
  5. Step 5: Solve for x
    x = 21,274,585,840.02/215,616.32
  6. Step 6: Final answer
    x = 98,668.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.