Home / 108,715.86-162,991.55-71,285.36

Finding the Fourth Proportional to 108,715.86, 162,991.55 and 71,285.36

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Solution

The fourth proportional to 108,715.86, 162,991.55 and 71,285.36 is: 106,874.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,715.86 : 162,991.55 = 71,285.36 : x
  2. Step 2: Convert to fraction form
    108,715.86/162,991.55 = 71,285.36/x
  3. Step 3: Cross multiply
    108,715.86x = 162,991.55 × 71,285.36
  4. Step 4: Simplify right side
    108,715.86x = 11,618,910,147.32
  5. Step 5: Solve for x
    x = 11,618,910,147.32/108,715.86
  6. Step 6: Final answer
    x = 106,874.10

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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.