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Finding the Fourth Proportional to 128,764.20, 193,146.30 and 109,737.30

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Solution

The fourth proportional to 128,764.20, 193,146.30 and 109,737.30 is: 164,605.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,764.20 : 193,146.30 = 109,737.30 : x
  2. Step 2: Convert to fraction form
    128,764.20/193,146.30 = 109,737.30/x
  3. Step 3: Cross multiply
    128,764.20x = 193,146.30 × 109,737.30
  4. Step 4: Simplify right side
    128,764.20x = 21,195,353,466.99
  5. Step 5: Solve for x
    x = 21,195,353,466.99/128,764.20
  6. Step 6: Final answer
    x = 164,605.95

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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.