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Finding the Fourth Proportional to 216,463.64, 324,727.73 and 66,691.40

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Solution

The fourth proportional to 216,463.64, 324,727.73 and 66,691.40 is: 100,047.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,463.64 : 324,727.73 = 66,691.40 : x
  2. Step 2: Convert to fraction form
    216,463.64/324,727.73 = 66,691.40/x
  3. Step 3: Cross multiply
    216,463.64x = 324,727.73 × 66,691.40
  4. Step 4: Simplify right side
    216,463.64x = 21,656,546,599.07
  5. Step 5: Solve for x
    x = 21,656,546,599.07/216,463.64
  6. Step 6: Final answer
    x = 100,047.04

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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.