Home / 81,344.16-121,922.55-31,402.26

Finding the Fourth Proportional to 81,344.16, 121,922.55 and 31,402.26

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Solution

The fourth proportional to 81,344.16, 121,922.55 and 31,402.26 is: 47,067.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,344.16 : 121,922.55 = 31,402.26 : x
  2. Step 2: Convert to fraction form
    81,344.16/121,922.55 = 31,402.26/x
  3. Step 3: Cross multiply
    81,344.16x = 121,922.55 × 31,402.26
  4. Step 4: Simplify right side
    81,344.16x = 3,828,643,614.96
  5. Step 5: Solve for x
    x = 3,828,643,614.96/81,344.16
  6. Step 6: Final answer
    x = 47,067.22

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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.