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Finding the Fourth Proportional to 136,748.94, 205,123.41 and 109,221.90

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Solution

The fourth proportional to 136,748.94, 205,123.41 and 109,221.90 is: 163,832.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,748.94 : 205,123.41 = 109,221.90 : x
  2. Step 2: Convert to fraction form
    136,748.94/205,123.41 = 109,221.90/x
  3. Step 3: Cross multiply
    136,748.94x = 205,123.41 × 109,221.90
  4. Step 4: Simplify right side
    136,748.94x = 22,403,968,574.68
  5. Step 5: Solve for x
    x = 22,403,968,574.68/136,748.94
  6. Step 6: Final answer
    x = 163,832.85

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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.