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Finding the Fourth Proportional to 131,781.87, 181,858.77 and 71,352.51

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Solution

The fourth proportional to 131,781.87, 181,858.77 and 71,352.51 is: 98,466.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,781.87 : 181,858.77 = 71,352.51 : x
  2. Step 2: Convert to fraction form
    131,781.87/181,858.77 = 71,352.51/x
  3. Step 3: Cross multiply
    131,781.87x = 181,858.77 × 71,352.51
  4. Step 4: Simplify right side
    131,781.87x = 12,976,079,705.01
  5. Step 5: Solve for x
    x = 12,976,079,705.01/131,781.87
  6. Step 6: Final answer
    x = 98,466.35

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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.