Home / 81,024.48-121,536.84-21,860.20

Finding the Fourth Proportional to 81,024.48, 121,536.84 and 21,860.20

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Solution

The fourth proportional to 81,024.48, 121,536.84 and 21,860.20 is: 32,790.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,024.48 : 121,536.84 = 21,860.20 : x
  2. Step 2: Convert to fraction form
    81,024.48/121,536.84 = 21,860.20/x
  3. Step 3: Cross multiply
    81,024.48x = 121,536.84 × 21,860.20
  4. Step 4: Simplify right side
    81,024.48x = 2,656,819,629.77
  5. Step 5: Solve for x
    x = 2,656,819,629.77/81,024.48
  6. Step 6: Final answer
    x = 32,790.33

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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.