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Finding the Fourth Proportional to 66,810.80, 100,216.20 and 43,191.20

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Solution

The fourth proportional to 66,810.80, 100,216.20 and 43,191.20 is: 64,786.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,810.80 : 100,216.20 = 43,191.20 : x
  2. Step 2: Convert to fraction form
    66,810.80/100,216.20 = 43,191.20/x
  3. Step 3: Cross multiply
    66,810.80x = 100,216.20 × 43,191.20
  4. Step 4: Simplify right side
    66,810.80x = 4,328,457,937.44
  5. Step 5: Solve for x
    x = 4,328,457,937.44/66,810.80
  6. Step 6: Final answer
    x = 64,786.80

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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.