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Finding the Fourth Proportional to 66,343.80, 99,515.70 and 45,348.60

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Solution

The fourth proportional to 66,343.80, 99,515.70 and 45,348.60 is: 68,022.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,343.80 : 99,515.70 = 45,348.60 : x
  2. Step 2: Convert to fraction form
    66,343.80/99,515.70 = 45,348.60/x
  3. Step 3: Cross multiply
    66,343.80x = 99,515.70 × 45,348.60
  4. Step 4: Simplify right side
    66,343.80x = 4,512,897,673.02
  5. Step 5: Solve for x
    x = 4,512,897,673.02/66,343.80
  6. Step 6: Final answer
    x = 68,022.90

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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.