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Finding the Fourth Proportional to 87,722.44, 120,980.46 and 62,178.28

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Solution

The fourth proportional to 87,722.44, 120,980.46 and 62,178.28 is: 85,751.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,722.44 : 120,980.46 = 62,178.28 : x
  2. Step 2: Convert to fraction form
    87,722.44/120,980.46 = 62,178.28/x
  3. Step 3: Cross multiply
    87,722.44x = 120,980.46 × 62,178.28
  4. Step 4: Simplify right side
    87,722.44x = 7,522,356,916.41
  5. Step 5: Solve for x
    x = 7,522,356,916.41/87,722.44
  6. Step 6: Final answer
    x = 85,751.80

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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.