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Finding the Fourth Proportional to 66,429,939.80, 99,644,909.70 and 18,560,883.80

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Solution

The fourth proportional to 66,429,939.80, 99,644,909.70 and 18,560,883.80 is: 27,841,325.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,429,939.80 : 99,644,909.70 = 18,560,883.80 : x
  2. Step 2: Convert to fraction form
    66,429,939.80/99,644,909.70 = 18,560,883.80/x
  3. Step 3: Cross multiply
    66,429,939.80x = 99,644,909.70 × 18,560,883.80
  4. Step 4: Simplify right side
    66,429,939.80x = 1,849,497,590,203,193
  5. Step 5: Solve for x
    x = 1,849,497,590,203,193/66,429,939.80
  6. Step 6: Final answer
    x = 27,841,325.70

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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.