Home / 80,566.60-120,849.90-68,643.40

Finding the Fourth Proportional to 80,566.60, 120,849.90 and 68,643.40

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Solution

The fourth proportional to 80,566.60, 120,849.90 and 68,643.40 is: 102,965.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,566.60 : 120,849.90 = 68,643.40 : x
  2. Step 2: Convert to fraction form
    80,566.60/120,849.90 = 68,643.40/x
  3. Step 3: Cross multiply
    80,566.60x = 120,849.90 × 68,643.40
  4. Step 4: Simplify right side
    80,566.60x = 8,295,548,025.66
  5. Step 5: Solve for x
    x = 8,295,548,025.66/80,566.60
  6. Step 6: Final answer
    x = 102,965.10

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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.