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Finding the Fourth Proportional to 66,438,665.80, 99,657,998.70 and 30,606,857.80

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Solution

The fourth proportional to 66,438,665.80, 99,657,998.70 and 30,606,857.80 is: 45,910,286.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,438,665.80 : 99,657,998.70 = 30,606,857.80 : x
  2. Step 2: Convert to fraction form
    66,438,665.80/99,657,998.70 = 30,606,857.80/x
  3. Step 3: Cross multiply
    66,438,665.80x = 99,657,998.70 × 30,606,857.80
  4. Step 4: Simplify right side
    66,438,665.80x = 3,050,218,194,843,485
  5. Step 5: Solve for x
    x = 3,050,218,194,843,485/66,438,665.80
  6. Step 6: Final answer
    x = 45,910,286.70

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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.