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Finding the Fourth Proportional to 103,640.30, 155,230.05 and 89,816.30

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Solution

The fourth proportional to 103,640.30, 155,230.05 and 89,816.30 is: 134,524.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,640.30 : 155,230.05 = 89,816.30 : x
  2. Step 2: Convert to fraction form
    103,640.30/155,230.05 = 89,816.30/x
  3. Step 3: Cross multiply
    103,640.30x = 155,230.05 × 89,816.30
  4. Step 4: Simplify right side
    103,640.30x = 13,942,188,739.82
  5. Step 5: Solve for x
    x = 13,942,188,739.82/103,640.30
  6. Step 6: Final answer
    x = 134,524.78

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1.5x scale

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.