Home / 81,332.51-121,975.29-28,022.31

Finding the Fourth Proportional to 81,332.51, 121,975.29 and 28,022.31

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Solution

The fourth proportional to 81,332.51, 121,975.29 and 28,022.31 is: 42,025.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,332.51 : 121,975.29 = 28,022.31 : x
  2. Step 2: Convert to fraction form
    81,332.51/121,975.29 = 28,022.31/x
  3. Step 3: Cross multiply
    81,332.51x = 121,975.29 × 28,022.31
  4. Step 4: Simplify right side
    81,332.51x = 3,418,029,388.72
  5. Step 5: Solve for x
    x = 3,418,029,388.72/81,332.51
  6. Step 6: Final answer
    x = 42,025.38

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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.