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Finding the Fourth Proportional to 106,505.70, 159,731.16 and 31,608.12

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Solution

The fourth proportional to 106,505.70, 159,731.16 and 31,608.12 is: 47,404.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,505.70 : 159,731.16 = 31,608.12 : x
  2. Step 2: Convert to fraction form
    106,505.70/159,731.16 = 31,608.12/x
  3. Step 3: Cross multiply
    106,505.70x = 159,731.16 × 31,608.12
  4. Step 4: Simplify right side
    106,505.70x = 5,048,801,673.02
  5. Step 5: Solve for x
    x = 5,048,801,673.02/106,505.70
  6. Step 6: Final answer
    x = 47,404.05

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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.