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Finding the Fourth Proportional to 266,021.55, 398,943.81 and 86,064.24

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Solution

The fourth proportional to 266,021.55, 398,943.81 and 86,064.24 is: 129,067.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,021.55 : 398,943.81 = 86,064.24 : x
  2. Step 2: Convert to fraction form
    266,021.55/398,943.81 = 86,064.24/x
  3. Step 3: Cross multiply
    266,021.55x = 398,943.81 × 86,064.24
  4. Step 4: Simplify right side
    266,021.55x = 34,334,795,810.35
  5. Step 5: Solve for x
    x = 34,334,795,810.35/266,021.55
  6. Step 6: Final answer
    x = 129,067.72

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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.