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Finding the Fourth Proportional to 67,989.64, 101,998.86 and 21,246.04

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Solution

The fourth proportional to 67,989.64, 101,998.86 and 21,246.04 is: 31,873.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,989.64 : 101,998.86 = 21,246.04 : x
  2. Step 2: Convert to fraction form
    67,989.64/101,998.86 = 21,246.04/x
  3. Step 3: Cross multiply
    67,989.64x = 101,998.86 × 21,246.04
  4. Step 4: Simplify right side
    67,989.64x = 2,167,071,859.51
  5. Step 5: Solve for x
    x = 2,167,071,859.51/67,989.64
  6. Step 6: Final answer
    x = 31,873.56

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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.