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Finding the Fourth Proportional to 266,705.70, 399,975.09 and 89,171.28

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Solution

The fourth proportional to 266,705.70, 399,975.09 and 89,171.28 is: 133,729.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,705.70 : 399,975.09 = 89,171.28 : x
  2. Step 2: Convert to fraction form
    266,705.70/399,975.09 = 89,171.28/x
  3. Step 3: Cross multiply
    266,705.70x = 399,975.09 × 89,171.28
  4. Step 4: Simplify right side
    266,705.70x = 35,666,290,743.42
  5. Step 5: Solve for x
    x = 35,666,290,743.42/266,705.70
  6. Step 6: Final answer
    x = 133,729.02

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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.