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Finding the Fourth Proportional to 266,389,487.70, 399,579,825.69 and 79,643,866.38

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Solution

The fourth proportional to 266,389,487.70, 399,579,825.69 and 79,643,866.38 is: 119,464,482.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,389,487.70 : 399,579,825.69 = 79,643,866.38 : x
  2. Step 2: Convert to fraction form
    266,389,487.70/399,579,825.69 = 79,643,866.38/x
  3. Step 3: Cross multiply
    266,389,487.70x = 399,579,825.69 × 79,643,866.38
  4. Step 4: Simplify right side
    266,389,487.70x = 31,824,082,245,398,048
  5. Step 5: Solve for x
    x = 31,824,082,245,398,048/266,389,487.70
  6. Step 6: Final answer
    x = 119,464,482.33

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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.