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Finding the Fourth Proportional to 72,904.70, 109,357.05 and 41,717.90

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Solution

The fourth proportional to 72,904.70, 109,357.05 and 41,717.90 is: 62,576.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,904.70 : 109,357.05 = 41,717.90 : x
  2. Step 2: Convert to fraction form
    72,904.70/109,357.05 = 41,717.90/x
  3. Step 3: Cross multiply
    72,904.70x = 109,357.05 × 41,717.90
  4. Step 4: Simplify right side
    72,904.70x = 4,562,146,476.20
  5. Step 5: Solve for x
    x = 4,562,146,476.20/72,904.70
  6. Step 6: Final answer
    x = 62,576.85

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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.