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Finding the Fourth Proportional to 121,993.60, 182,990.40 and 120,827.20

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Solution

The fourth proportional to 121,993.60, 182,990.40 and 120,827.20 is: 181,240.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,993.60 : 182,990.40 = 120,827.20 : x
  2. Step 2: Convert to fraction form
    121,993.60/182,990.40 = 120,827.20/x
  3. Step 3: Cross multiply
    121,993.60x = 182,990.40 × 120,827.20
  4. Step 4: Simplify right side
    121,993.60x = 22,110,217,658.88
  5. Step 5: Solve for x
    x = 22,110,217,658.88/121,993.60
  6. Step 6: Final answer
    x = 181,240.80

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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.