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Finding the Fourth Proportional to 121,213.72, 181,620.10 and 61,967.89

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Solution

The fourth proportional to 121,213.72, 181,620.10 and 61,967.89 is: 92,849.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,213.72 : 181,620.10 = 61,967.89 : x
  2. Step 2: Convert to fraction form
    121,213.72/181,620.10 = 61,967.89/x
  3. Step 3: Cross multiply
    121,213.72x = 181,620.10 × 61,967.89
  4. Step 4: Simplify right side
    121,213.72x = 11,254,613,160.65
  5. Step 5: Solve for x
    x = 11,254,613,160.65/121,213.72
  6. Step 6: Final answer
    x = 92,849.34

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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.