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Finding the Fourth Proportional to 131,781.80, 181,858.61 and 71,352.50

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Solution

The fourth proportional to 131,781.80, 181,858.61 and 71,352.50 is: 98,466.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,781.80 : 181,858.61 = 71,352.50 : x
  2. Step 2: Convert to fraction form
    131,781.80/181,858.61 = 71,352.50/x
  3. Step 3: Cross multiply
    131,781.80x = 181,858.61 × 71,352.50
  4. Step 4: Simplify right side
    131,781.80x = 12,976,065,203.97
  5. Step 5: Solve for x
    x = 12,976,065,203.97/131,781.80
  6. Step 6: Final answer
    x = 98,466.30

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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.