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Finding the Fourth Proportional to 109,407.80, 164,046.90 and 56,919.80

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Solution

The fourth proportional to 109,407.80, 164,046.90 and 56,919.80 is: 85,345.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,407.80 : 164,046.90 = 56,919.80 : x
  2. Step 2: Convert to fraction form
    109,407.80/164,046.90 = 56,919.80/x
  3. Step 3: Cross multiply
    109,407.80x = 164,046.90 × 56,919.80
  4. Step 4: Simplify right side
    109,407.80x = 9,337,516,738.62
  5. Step 5: Solve for x
    x = 9,337,516,738.62/109,407.80
  6. Step 6: Final answer
    x = 85,345.99

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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.