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Finding the Fourth Proportional to 72,937.72, 109,289.92 and 65,939.32

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Solution

The fourth proportional to 72,937.72, 109,289.92 and 65,939.32 is: 98,803.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,937.72 : 109,289.92 = 65,939.32 : x
  2. Step 2: Convert to fraction form
    72,937.72/109,289.92 = 65,939.32/x
  3. Step 3: Cross multiply
    72,937.72x = 109,289.92 × 65,939.32
  4. Step 4: Simplify right side
    72,937.72x = 7,206,503,007.65
  5. Step 5: Solve for x
    x = 7,206,503,007.65/72,937.72
  6. Step 6: Final answer
    x = 98,803.51

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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.