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Finding the Fourth Proportional to 159,170, 219,685.80 and 91,232.51

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Solution

The fourth proportional to 159,170, 219,685.80 and 91,232.51 is: 125,918.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,170 : 219,685.80 = 91,232.51 : x
  2. Step 2: Convert to fraction form
    159,170/219,685.80 = 91,232.51/x
  3. Step 3: Cross multiply
    159,170x = 219,685.80 × 91,232.51
  4. Step 4: Simplify right side
    159,170x = 20,042,486,489.20
  5. Step 5: Solve for x
    x = 20,042,486,489.20/159,170
  6. Step 6: Final answer
    x = 125,918.74

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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.