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Finding the Fourth Proportional to 87,423.68, 120,649.44 and 66,165.44

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Solution

The fourth proportional to 87,423.68, 120,649.44 and 66,165.44 is: 91,311.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,423.68 : 120,649.44 = 66,165.44 : x
  2. Step 2: Convert to fraction form
    87,423.68/120,649.44 = 66,165.44/x
  3. Step 3: Cross multiply
    87,423.68x = 120,649.44 × 66,165.44
  4. Step 4: Simplify right side
    87,423.68x = 7,982,823,283.35
  5. Step 5: Solve for x
    x = 7,982,823,283.35/87,423.68
  6. Step 6: Final answer
    x = 91,311.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.