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Finding the Fourth Proportional to 109,400.60, 164,100.90 and 91,904.60

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Solution

The fourth proportional to 109,400.60, 164,100.90 and 91,904.60 is: 137,856.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,400.60 : 164,100.90 = 91,904.60 : x
  2. Step 2: Convert to fraction form
    109,400.60/164,100.90 = 91,904.60/x
  3. Step 3: Cross multiply
    109,400.60x = 164,100.90 × 91,904.60
  4. Step 4: Simplify right side
    109,400.60x = 15,081,627,574.14
  5. Step 5: Solve for x
    x = 15,081,627,574.14/109,400.60
  6. Step 6: Final answer
    x = 137,856.90

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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.