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Finding the Fourth Proportional to 109,912.60, 164,868.90 and 65,589.40

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Solution

The fourth proportional to 109,912.60, 164,868.90 and 65,589.40 is: 98,384.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,912.60 : 164,868.90 = 65,589.40 : x
  2. Step 2: Convert to fraction form
    109,912.60/164,868.90 = 65,589.40/x
  3. Step 3: Cross multiply
    109,912.60x = 164,868.90 × 65,589.40
  4. Step 4: Simplify right side
    109,912.60x = 10,813,652,229.66
  5. Step 5: Solve for x
    x = 10,813,652,229.66/109,912.60
  6. Step 6: Final answer
    x = 98,384.10

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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.