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Finding the Fourth Proportional to 66,978,701.74, 100,321,574.17 and 47,488,850.36

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Solution

The fourth proportional to 66,978,701.74, 100,321,574.17 and 47,488,850.36 is: 71,129,420.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,978,701.74 : 100,321,574.17 = 47,488,850.36 : x
  2. Step 2: Convert to fraction form
    66,978,701.74/100,321,574.17 = 47,488,850.36/x
  3. Step 3: Cross multiply
    66,978,701.74x = 100,321,574.17 × 47,488,850.36
  4. Step 4: Simplify right side
    66,978,701.74x = 4,764,156,223,638,771
  5. Step 5: Solve for x
    x = 4,764,156,223,638,771/66,978,701.74
  6. Step 6: Final answer
    x = 71,129,420.25

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.