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Finding the Fourth Proportional to 121,282.44, 181,587.78 and 61,990.44

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Solution

The fourth proportional to 121,282.44, 181,587.78 and 61,990.44 is: 92,813.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,282.44 : 181,587.78 = 61,990.44 : x
  2. Step 2: Convert to fraction form
    121,282.44/181,587.78 = 61,990.44/x
  3. Step 3: Cross multiply
    121,282.44x = 181,587.78 × 61,990.44
  4. Step 4: Simplify right side
    121,282.44x = 11,256,706,380.82
  5. Step 5: Solve for x
    x = 11,256,706,380.82/121,282.44
  6. Step 6: Final answer
    x = 92,813.98

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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.