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Finding the Fourth Proportional to 131,682.71, 181,720.78 and 71,252.02

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Solution

The fourth proportional to 131,682.71, 181,720.78 and 71,252.02 is: 98,327.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,682.71 : 181,720.78 = 71,252.02 : x
  2. Step 2: Convert to fraction form
    131,682.71/181,720.78 = 71,252.02/x
  3. Step 3: Cross multiply
    131,682.71x = 181,720.78 × 71,252.02
  4. Step 4: Simplify right side
    131,682.71x = 12,947,972,650.98
  5. Step 5: Solve for x
    x = 12,947,972,650.98/131,682.71
  6. Step 6: Final answer
    x = 98,327.05

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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.