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Finding the Fourth Proportional to 66,912,297.20, 100,368,445.80 and 36,301,295.60

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Solution

The fourth proportional to 66,912,297.20, 100,368,445.80 and 36,301,295.60 is: 54,451,943.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,912,297.20 : 100,368,445.80 = 36,301,295.60 : x
  2. Step 2: Convert to fraction form
    66,912,297.20/100,368,445.80 = 36,301,295.60/x
  3. Step 3: Cross multiply
    66,912,297.20x = 100,368,445.80 × 36,301,295.60
  4. Step 4: Simplify right side
    66,912,297.20x = 3,643,504,619,898,378.50
  5. Step 5: Solve for x
    x = 3,643,504,619,898,378.50/66,912,297.20
  6. Step 6: Final answer
    x = 54,451,943.40

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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.