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Finding the Fourth Proportional to 121,368.60, 182,247.30 and 91,819.80

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Solution

The fourth proportional to 121,368.60, 182,247.30 and 91,819.80 is: 137,876.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,368.60 : 182,247.30 = 91,819.80 : x
  2. Step 2: Convert to fraction form
    121,368.60/182,247.30 = 91,819.80/x
  3. Step 3: Cross multiply
    121,368.60x = 182,247.30 × 91,819.80
  4. Step 4: Simplify right side
    121,368.60x = 16,733,910,636.54
  5. Step 5: Solve for x
    x = 16,733,910,636.54/121,368.60
  6. Step 6: Final answer
    x = 137,876.77

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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.