Home / 80,933.20-121,428.60-78,053.20

Finding the Fourth Proportional to 80,933.20, 121,428.60 and 78,053.20

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Solution

The fourth proportional to 80,933.20, 121,428.60 and 78,053.20 is: 117,107.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,933.20 : 121,428.60 = 78,053.20 : x
  2. Step 2: Convert to fraction form
    80,933.20/121,428.60 = 78,053.20/x
  3. Step 3: Cross multiply
    80,933.20x = 121,428.60 × 78,053.20
  4. Step 4: Simplify right side
    80,933.20x = 9,477,890,801.52
  5. Step 5: Solve for x
    x = 9,477,890,801.52/80,933.20
  6. Step 6: Final answer
    x = 117,107.58

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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.