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Finding the Fourth Proportional to 80,172.91, 120,300.87 and 58,167.91

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Solution

The fourth proportional to 80,172.91, 120,300.87 and 58,167.91 is: 87,281.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,172.91 : 120,300.87 = 58,167.91 : x
  2. Step 2: Convert to fraction form
    80,172.91/120,300.87 = 58,167.91/x
  3. Step 3: Cross multiply
    80,172.91x = 120,300.87 × 58,167.91
  4. Step 4: Simplify right side
    80,172.91x = 6,997,650,179.08
  5. Step 5: Solve for x
    x = 6,997,650,179.08/80,172.91
  6. Step 6: Final answer
    x = 87,281.98

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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.