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Finding the Fourth Proportional to 66,750.80, 100,223.40 and 40,506.80

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Solution

The fourth proportional to 66,750.80, 100,223.40 and 40,506.80 is: 60,819.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,750.80 : 100,223.40 = 40,506.80 : x
  2. Step 2: Convert to fraction form
    66,750.80/100,223.40 = 40,506.80/x
  3. Step 3: Cross multiply
    66,750.80x = 100,223.40 × 40,506.80
  4. Step 4: Simplify right side
    66,750.80x = 4,059,729,219.12
  5. Step 5: Solve for x
    x = 4,059,729,219.12/66,750.80
  6. Step 6: Final answer
    x = 60,819.18

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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.