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Finding the Fourth Proportional to 80,569.91, 120,813.35 and 36,158.59

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Solution

The fourth proportional to 80,569.91, 120,813.35 and 36,158.59 is: 54,219.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,569.91 : 120,813.35 = 36,158.59 : x
  2. Step 2: Convert to fraction form
    80,569.91/120,813.35 = 36,158.59/x
  3. Step 3: Cross multiply
    80,569.91x = 120,813.35 × 36,158.59
  4. Step 4: Simplify right side
    80,569.91x = 4,368,440,389.18
  5. Step 5: Solve for x
    x = 4,368,440,389.18/80,569.91
  6. Step 6: Final answer
    x = 54,219.25

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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.