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Finding the Fourth Proportional to 266,616.31, 399,881.09 and 89,123.04

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Solution

The fourth proportional to 266,616.31, 399,881.09 and 89,123.04 is: 133,670.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,616.31 : 399,881.09 = 89,123.04 : x
  2. Step 2: Convert to fraction form
    266,616.31/399,881.09 = 89,123.04/x
  3. Step 3: Cross multiply
    266,616.31x = 399,881.09 × 89,123.04
  4. Step 4: Simplify right side
    266,616.31x = 35,638,618,379.31
  5. Step 5: Solve for x
    x = 35,638,618,379.31/266,616.31
  6. Step 6: Final answer
    x = 133,670.06

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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.