Home / 80,966.10-121,435.41-21,788.58

Finding the Fourth Proportional to 80,966.10, 121,435.41 and 21,788.58

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Solution

The fourth proportional to 80,966.10, 121,435.41 and 21,788.58 is: 32,679.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,966.10 : 121,435.41 = 21,788.58 : x
  2. Step 2: Convert to fraction form
    80,966.10/121,435.41 = 21,788.58/x
  3. Step 3: Cross multiply
    80,966.10x = 121,435.41 × 21,788.58
  4. Step 4: Simplify right side
    80,966.10x = 2,645,905,145.62
  5. Step 5: Solve for x
    x = 2,645,905,145.62/80,966.10
  6. Step 6: Final answer
    x = 32,679.17

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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.