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Finding the Fourth Proportional to 145,940.40, 218,910.60 and 40,759.20

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Solution

The fourth proportional to 145,940.40, 218,910.60 and 40,759.20 is: 61,138.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,940.40 : 218,910.60 = 40,759.20 : x
  2. Step 2: Convert to fraction form
    145,940.40/218,910.60 = 40,759.20/x
  3. Step 3: Cross multiply
    145,940.40x = 218,910.60 × 40,759.20
  4. Step 4: Simplify right side
    145,940.40x = 8,922,620,927.52
  5. Step 5: Solve for x
    x = 8,922,620,927.52/145,940.40
  6. Step 6: Final answer
    x = 61,138.80

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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.