Home / 143,933.60-215,608.80-81,531.20

Finding the Fourth Proportional to 143,933.60, 215,608.80 and 81,531.20

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Solution

The fourth proportional to 143,933.60, 215,608.80 and 81,531.20 is: 122,131.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,933.60 : 215,608.80 = 81,531.20 : x
  2. Step 2: Convert to fraction form
    143,933.60/215,608.80 = 81,531.20/x
  3. Step 3: Cross multiply
    143,933.60x = 215,608.80 × 81,531.20
  4. Step 4: Simplify right side
    143,933.60x = 17,578,844,194.56
  5. Step 5: Solve for x
    x = 17,578,844,194.56/143,933.60
  6. Step 6: Final answer
    x = 122,131.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.