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Finding the Fourth Proportional to 91,891.92, 126,838.36 and 53,661.80

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Solution

The fourth proportional to 91,891.92, 126,838.36 and 53,661.80 is: 74,069.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,891.92 : 126,838.36 = 53,661.80 : x
  2. Step 2: Convert to fraction form
    91,891.92/126,838.36 = 53,661.80/x
  3. Step 3: Cross multiply
    91,891.92x = 126,838.36 × 53,661.80
  4. Step 4: Simplify right side
    91,891.92x = 6,806,374,706.65
  5. Step 5: Solve for x
    x = 6,806,374,706.65/91,891.92
  6. Step 6: Final answer
    x = 74,069.35

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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.