Home / 212,288.22-318,484.17-87,664.86

Finding the Fourth Proportional to 212,288.22, 318,484.17 and 87,664.86

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Solution

The fourth proportional to 212,288.22, 318,484.17 and 87,664.86 is: 131,518.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,288.22 : 318,484.17 = 87,664.86 : x
  2. Step 2: Convert to fraction form
    212,288.22/318,484.17 = 87,664.86/x
  3. Step 3: Cross multiply
    212,288.22x = 318,484.17 × 87,664.86
  4. Step 4: Simplify right side
    212,288.22x = 27,919,870,175.27
  5. Step 5: Solve for x
    x = 27,919,870,175.27/212,288.22
  6. Step 6: Final answer
    x = 131,518.70

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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.