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Finding the Fourth Proportional to 66,429,907.80, 99,644,861.70 and 18,560,851.80

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Solution

The fourth proportional to 66,429,907.80, 99,644,861.70 and 18,560,851.80 is: 27,841,277.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,429,907.80 : 99,644,861.70 = 18,560,851.80 : x
  2. Step 2: Convert to fraction form
    66,429,907.80/99,644,861.70 = 18,560,851.80/x
  3. Step 3: Cross multiply
    66,429,907.80x = 99,644,861.70 × 18,560,851.80
  4. Step 4: Simplify right side
    66,429,907.80x = 1,849,493,510,645,196.25
  5. Step 5: Solve for x
    x = 1,849,493,510,645,196.25/66,429,907.80
  6. Step 6: Final answer
    x = 27,841,277.70

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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.