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Finding the Fourth Proportional to 66,435,965.10, 99,644,616.45 and 21,002,352.30

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Solution

The fourth proportional to 66,435,965.10, 99,644,616.45 and 21,002,352.30 is: 31,500,578.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,435,965.10 : 99,644,616.45 = 21,002,352.30 : x
  2. Step 2: Convert to fraction form
    66,435,965.10/99,644,616.45 = 21,002,352.30/x
  3. Step 3: Cross multiply
    66,435,965.10x = 99,644,616.45 × 21,002,352.30
  4. Step 4: Simplify right side
    66,435,965.10x = 2,092,771,339,481,275.50
  5. Step 5: Solve for x
    x = 2,092,771,339,481,275.50/66,435,965.10
  6. Step 6: Final answer
    x = 31,500,578.58

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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.