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Finding the Fourth Proportional to 109,390.40, 164,085.60 and 39,260.60

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Solution

The fourth proportional to 109,390.40, 164,085.60 and 39,260.60 is: 58,890.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,390.40 : 164,085.60 = 39,260.60 : x
  2. Step 2: Convert to fraction form
    109,390.40/164,085.60 = 39,260.60/x
  3. Step 3: Cross multiply
    109,390.40x = 164,085.60 × 39,260.60
  4. Step 4: Simplify right side
    109,390.40x = 6,442,099,107.36
  5. Step 5: Solve for x
    x = 6,442,099,107.36/109,390.40
  6. Step 6: Final answer
    x = 58,890.90

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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.