Home / 81,281.13-121,909.38-22,121.41

Finding the Fourth Proportional to 81,281.13, 121,909.38 and 22,121.41

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Solution

The fourth proportional to 81,281.13, 121,909.38 and 22,121.41 is: 33,178.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,281.13 : 121,909.38 = 22,121.41 : x
  2. Step 2: Convert to fraction form
    81,281.13/121,909.38 = 22,121.41/x
  3. Step 3: Cross multiply
    81,281.13x = 121,909.38 × 22,121.41
  4. Step 4: Simplify right side
    81,281.13x = 2,696,807,682.60
  5. Step 5: Solve for x
    x = 2,696,807,682.60/81,281.13
  6. Step 6: Final answer
    x = 33,178.77

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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.