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Finding the Fourth Proportional to 66,446,851.70, 99,651,615.15 and 21,022,570.10

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Solution

The fourth proportional to 66,446,851.70, 99,651,615.15 and 21,022,570.10 is: 31,527,950.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,446,851.70 : 99,651,615.15 = 21,022,570.10 : x
  2. Step 2: Convert to fraction form
    66,446,851.70/99,651,615.15 = 21,022,570.10/x
  3. Step 3: Cross multiply
    66,446,851.70x = 99,651,615.15 × 21,022,570.10
  4. Step 4: Simplify right side
    66,446,851.70x = 2,094,933,065,069,097.25
  5. Step 5: Solve for x
    x = 2,094,933,065,069,097.25/66,446,851.70
  6. Step 6: Final answer
    x = 31,527,950.71

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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.