Home / 215,999.10-323,998.65-121,131.90

Finding the Fourth Proportional to 215,999.10, 323,998.65 and 121,131.90

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Solution

The fourth proportional to 215,999.10, 323,998.65 and 121,131.90 is: 181,697.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,999.10 : 323,998.65 = 121,131.90 : x
  2. Step 2: Convert to fraction form
    215,999.10/323,998.65 = 121,131.90/x
  3. Step 3: Cross multiply
    215,999.10x = 323,998.65 × 121,131.90
  4. Step 4: Simplify right side
    215,999.10x = 39,246,572,071.94
  5. Step 5: Solve for x
    x = 39,246,572,071.94/215,999.10
  6. Step 6: Final answer
    x = 181,697.85

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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.