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Finding the Fourth Proportional to 66,220.80, 99,201.60 and 39,847.20

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Solution

The fourth proportional to 66,220.80, 99,201.60 and 39,847.20 is: 59,692.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,220.80 : 99,201.60 = 39,847.20 : x
  2. Step 2: Convert to fraction form
    66,220.80/99,201.60 = 39,847.20/x
  3. Step 3: Cross multiply
    66,220.80x = 99,201.60 × 39,847.20
  4. Step 4: Simplify right side
    66,220.80x = 3,952,905,995.52
  5. Step 5: Solve for x
    x = 3,952,905,995.52/66,220.80
  6. Step 6: Final answer
    x = 59,692.82

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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.