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Finding the Fourth Proportional to 72,046.72, 107,916.48 and 40,865.92

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Solution

The fourth proportional to 72,046.72, 107,916.48 and 40,865.92 is: 61,211.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,046.72 : 107,916.48 = 40,865.92 : x
  2. Step 2: Convert to fraction form
    72,046.72/107,916.48 = 40,865.92/x
  3. Step 3: Cross multiply
    72,046.72x = 107,916.48 × 40,865.92
  4. Step 4: Simplify right side
    72,046.72x = 4,410,106,238.36
  5. Step 5: Solve for x
    x = 4,410,106,238.36/72,046.72
  6. Step 6: Final answer
    x = 61,211.76

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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.