Home / 81,357.22-121,990.13-55,740.46

Finding the Fourth Proportional to 81,357.22, 121,990.13 and 55,740.46

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Solution

The fourth proportional to 81,357.22, 121,990.13 and 55,740.46 is: 83,579.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,357.22 : 121,990.13 = 55,740.46 : x
  2. Step 2: Convert to fraction form
    81,357.22/121,990.13 = 55,740.46/x
  3. Step 3: Cross multiply
    81,357.22x = 121,990.13 × 55,740.46
  4. Step 4: Simplify right side
    81,357.22x = 6,799,786,002.07
  5. Step 5: Solve for x
    x = 6,799,786,002.07/81,357.22
  6. Step 6: Final answer
    x = 83,579.38

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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.