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Finding the Fourth Proportional to 100,904.60, 151,356.90 and 91,063.10

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Solution

The fourth proportional to 100,904.60, 151,356.90 and 91,063.10 is: 136,594.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,904.60 : 151,356.90 = 91,063.10 : x
  2. Step 2: Convert to fraction form
    100,904.60/151,356.90 = 91,063.10/x
  3. Step 3: Cross multiply
    100,904.60x = 151,356.90 × 91,063.10
  4. Step 4: Simplify right side
    100,904.60x = 13,783,028,520.39
  5. Step 5: Solve for x
    x = 13,783,028,520.39/100,904.60
  6. Step 6: Final answer
    x = 136,594.65

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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.