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Finding the Fourth Proportional to 72,906.70, 109,360.06 and 41,719.90

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Solution

The fourth proportional to 72,906.70, 109,360.06 and 41,719.90 is: 62,579.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,906.70 : 109,360.06 = 41,719.90 : x
  2. Step 2: Convert to fraction form
    72,906.70/109,360.06 = 41,719.90/x
  3. Step 3: Cross multiply
    72,906.70x = 109,360.06 × 41,719.90
  4. Step 4: Simplify right side
    72,906.70x = 4,562,490,767.19
  5. Step 5: Solve for x
    x = 4,562,490,767.19/72,906.70
  6. Step 6: Final answer
    x = 62,579.86

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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.