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Finding the Fourth Proportional to 131,871.71, 181,982.73 and 71,443.88

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Solution

The fourth proportional to 131,871.71, 181,982.73 and 71,443.88 is: 98,592.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,871.71 : 181,982.73 = 71,443.88 : x
  2. Step 2: Convert to fraction form
    131,871.71/181,982.73 = 71,443.88/x
  3. Step 3: Cross multiply
    131,871.71x = 181,982.73 × 71,443.88
  4. Step 4: Simplify right side
    131,871.71x = 13,001,552,324.19
  5. Step 5: Solve for x
    x = 13,001,552,324.19/131,871.71
  6. Step 6: Final answer
    x = 98,592.43

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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.