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Finding the Fourth Proportional to 81,363.26, 112,185.64 and 65,217.66

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Solution

The fourth proportional to 81,363.26, 112,185.64 and 65,217.66 is: 89,923.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,363.26 : 112,185.64 = 65,217.66 : x
  2. Step 2: Convert to fraction form
    81,363.26/112,185.64 = 65,217.66/x
  3. Step 3: Cross multiply
    81,363.26x = 112,185.64 × 65,217.66
  4. Step 4: Simplify right side
    81,363.26x = 7,316,484,926.40
  5. Step 5: Solve for x
    x = 7,316,484,926.40/81,363.26
  6. Step 6: Final answer
    x = 89,923.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.