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Finding the Fourth Proportional to 121,074.61, 181,611.61 and 57,702.64

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Solution

The fourth proportional to 121,074.61, 181,611.61 and 57,702.64 is: 86,553.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,074.61 : 181,611.61 = 57,702.64 : x
  2. Step 2: Convert to fraction form
    121,074.61/181,611.61 = 57,702.64/x
  3. Step 3: Cross multiply
    121,074.61x = 181,611.61 × 57,702.64
  4. Step 4: Simplify right side
    121,074.61x = 10,479,469,351.65
  5. Step 5: Solve for x
    x = 10,479,469,351.65/121,074.61
  6. Step 6: Final answer
    x = 86,553.81

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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.