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Finding the Fourth Proportional to 43,603.20, 65,481.60 and 42,220.80

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Solution

The fourth proportional to 43,603.20, 65,481.60 and 42,220.80 is: 63,405.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,603.20 : 65,481.60 = 42,220.80 : x
  2. Step 2: Convert to fraction form
    43,603.20/65,481.60 = 42,220.80/x
  3. Step 3: Cross multiply
    43,603.20x = 65,481.60 × 42,220.80
  4. Step 4: Simplify right side
    43,603.20x = 2,764,685,537.28
  5. Step 5: Solve for x
    x = 2,764,685,537.28/43,603.20
  6. Step 6: Final answer
    x = 63,405.57

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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.