Home / 81,280.88-121,909.01-22,121.16

Finding the Fourth Proportional to 81,280.88, 121,909.01 and 22,121.16

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Solution

The fourth proportional to 81,280.88, 121,909.01 and 22,121.16 is: 33,178.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,280.88 : 121,909.01 = 22,121.16 : x
  2. Step 2: Convert to fraction form
    81,280.88/121,909.01 = 22,121.16/x
  3. Step 3: Cross multiply
    81,280.88x = 121,909.01 × 22,121.16
  4. Step 4: Simplify right side
    81,280.88x = 2,696,768,909.82
  5. Step 5: Solve for x
    x = 2,696,768,909.82/81,280.88
  6. Step 6: Final answer
    x = 33,178.39

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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.