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Finding the Fourth Proportional to 66,206.92, 99,313.80 and 21,831.88

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Solution

The fourth proportional to 66,206.92, 99,313.80 and 21,831.88 is: 32,748.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,206.92 : 99,313.80 = 21,831.88 : x
  2. Step 2: Convert to fraction form
    66,206.92/99,313.80 = 21,831.88/x
  3. Step 3: Cross multiply
    66,206.92x = 99,313.80 × 21,831.88
  4. Step 4: Simplify right side
    66,206.92x = 2,168,206,963.94
  5. Step 5: Solve for x
    x = 2,168,206,963.94/66,206.92
  6. Step 6: Final answer
    x = 32,748.95

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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.