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Finding the Fourth Proportional to 100,940.40, 151,410.60 and 30,810.60

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Solution

The fourth proportional to 100,940.40, 151,410.60 and 30,810.60 is: 46,215.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,940.40 : 151,410.60 = 30,810.60 : x
  2. Step 2: Convert to fraction form
    100,940.40/151,410.60 = 30,810.60/x
  3. Step 3: Cross multiply
    100,940.40x = 151,410.60 × 30,810.60
  4. Step 4: Simplify right side
    100,940.40x = 4,665,051,432.36
  5. Step 5: Solve for x
    x = 4,665,051,432.36/100,940.40
  6. Step 6: Final answer
    x = 46,215.90

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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.