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Finding the Fourth Proportional to 72,979,304.90, 109,454,960.55 and 21,862,991.30

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Solution

The fourth proportional to 72,979,304.90, 109,454,960.55 and 21,862,991.30 is: 32,790,293.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,979,304.90 : 109,454,960.55 = 21,862,991.30 : x
  2. Step 2: Convert to fraction form
    72,979,304.90/109,454,960.55 = 21,862,991.30/x
  3. Step 3: Cross multiply
    72,979,304.90x = 109,454,960.55 × 21,862,991.30
  4. Step 4: Simplify right side
    72,979,304.90x = 2,393,012,850,246,493
  5. Step 5: Solve for x
    x = 2,393,012,850,246,493/72,979,304.90
  6. Step 6: Final answer
    x = 32,790,293.82

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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.