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Finding the Fourth Proportional to 80,774.80, 121,435.88 and 65,089.96

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Solution

The fourth proportional to 80,774.80, 121,435.88 and 65,089.96 is: 97,855.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,774.80 : 121,435.88 = 65,089.96 : x
  2. Step 2: Convert to fraction form
    80,774.80/121,435.88 = 65,089.96/x
  3. Step 3: Cross multiply
    80,774.80x = 121,435.88 × 65,089.96
  4. Step 4: Simplify right side
    80,774.80x = 7,904,255,942.73
  5. Step 5: Solve for x
    x = 7,904,255,942.73/80,774.80
  6. Step 6: Final answer
    x = 97,855.47

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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.