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Finding the Fourth Proportional to 72,874.41, 109,311.63 and 56,258.70

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Solution

The fourth proportional to 72,874.41, 109,311.63 and 56,258.70 is: 84,388.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,874.41 : 109,311.63 = 56,258.70 : x
  2. Step 2: Convert to fraction form
    72,874.41/109,311.63 = 56,258.70/x
  3. Step 3: Cross multiply
    72,874.41x = 109,311.63 × 56,258.70
  4. Step 4: Simplify right side
    72,874.41x = 6,149,730,198.68
  5. Step 5: Solve for x
    x = 6,149,730,198.68/72,874.41
  6. Step 6: Final answer
    x = 84,388.06

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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.