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Finding the Fourth Proportional to 66,978,700.74, 100,321,572.67 and 47,488,849.36

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Solution

The fourth proportional to 66,978,700.74, 100,321,572.67 and 47,488,849.36 is: 71,129,418.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,978,700.74 : 100,321,572.67 = 47,488,849.36 : x
  2. Step 2: Convert to fraction form
    66,978,700.74/100,321,572.67 = 47,488,849.36/x
  3. Step 3: Cross multiply
    66,978,700.74x = 100,321,572.67 × 47,488,849.36
  4. Step 4: Simplify right side
    66,978,700.74x = 4,764,156,051,714,397
  5. Step 5: Solve for x
    x = 4,764,156,051,714,397/66,978,700.74
  6. Step 6: Final answer
    x = 71,129,418.74

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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.