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Finding the Fourth Proportional to 109,788.98, 151,450.36 and 66,781.62

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Solution

The fourth proportional to 109,788.98, 151,450.36 and 66,781.62 is: 92,123.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,788.98 : 151,450.36 = 66,781.62 : x
  2. Step 2: Convert to fraction form
    109,788.98/151,450.36 = 66,781.62/x
  3. Step 3: Cross multiply
    109,788.98x = 151,450.36 × 66,781.62
  4. Step 4: Simplify right side
    109,788.98x = 10,114,100,390.38
  5. Step 5: Solve for x
    x = 10,114,100,390.38/109,788.98
  6. Step 6: Final answer
    x = 92,123.09

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1.5x scale

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.