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Finding the Fourth Proportional to 89,818.20, 134,640.90 and 69,816.60

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Solution

The fourth proportional to 89,818.20, 134,640.90 and 69,816.60 is: 104,657.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,818.20 : 134,640.90 = 69,816.60 : x
  2. Step 2: Convert to fraction form
    89,818.20/134,640.90 = 69,816.60/x
  3. Step 3: Cross multiply
    89,818.20x = 134,640.90 × 69,816.60
  4. Step 4: Simplify right side
    89,818.20x = 9,400,169,858.94
  5. Step 5: Solve for x
    x = 9,400,169,858.94/89,818.20
  6. Step 6: Final answer
    x = 104,657.74

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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.