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Finding the Fourth Proportional to 101,287.20, 151,916.40 and 31,173.60

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Solution

The fourth proportional to 101,287.20, 151,916.40 and 31,173.60 is: 46,755.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,287.20 : 151,916.40 = 31,173.60 : x
  2. Step 2: Convert to fraction form
    101,287.20/151,916.40 = 31,173.60/x
  3. Step 3: Cross multiply
    101,287.20x = 151,916.40 × 31,173.60
  4. Step 4: Simplify right side
    101,287.20x = 4,735,781,087.04
  5. Step 5: Solve for x
    x = 4,735,781,087.04/101,287.20
  6. Step 6: Final answer
    x = 46,755.97

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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.