Home / 81,321.47-121,967.51-22,143.29

Finding the Fourth Proportional to 81,321.47, 121,967.51 and 22,143.29

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Solution

The fourth proportional to 81,321.47, 121,967.51 and 22,143.29 is: 33,210.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,321.47 : 121,967.51 = 22,143.29 : x
  2. Step 2: Convert to fraction form
    81,321.47/121,967.51 = 22,143.29/x
  3. Step 3: Cross multiply
    81,321.47x = 121,967.51 × 22,143.29
  4. Step 4: Simplify right side
    81,321.47x = 2,700,761,910.02
  5. Step 5: Solve for x
    x = 2,700,761,910.02/81,321.47
  6. Step 6: Final answer
    x = 33,210.93

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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.