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Finding the Fourth Proportional to 91,433.61, 126,057.47 and 65,918.61

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Solution

The fourth proportional to 91,433.61, 126,057.47 and 65,918.61 is: 90,880.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,433.61 : 126,057.47 = 65,918.61 : x
  2. Step 2: Convert to fraction form
    91,433.61/126,057.47 = 65,918.61/x
  3. Step 3: Cross multiply
    91,433.61x = 126,057.47 × 65,918.61
  4. Step 4: Simplify right side
    91,433.61x = 8,309,532,872.92
  5. Step 5: Solve for x
    x = 8,309,532,872.92/91,433.61
  6. Step 6: Final answer
    x = 90,880.51

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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.