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Finding the Fourth Proportional to 131,394, 181,324.44 and 71,778

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Solution

The fourth proportional to 131,394, 181,324.44 and 71,778 is: 99,054.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,394 : 181,324.44 = 71,778 : x
  2. Step 2: Convert to fraction form
    131,394/181,324.44 = 71,778/x
  3. Step 3: Cross multiply
    131,394x = 181,324.44 × 71,778
  4. Step 4: Simplify right side
    131,394x = 13,015,105,654.32
  5. Step 5: Solve for x
    x = 13,015,105,654.32/131,394
  6. Step 6: Final answer
    x = 99,054.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.