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Finding the Fourth Proportional to 72,518.76, 108,821.27 and 39,238.16

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Solution

The fourth proportional to 72,518.76, 108,821.27 and 39,238.16 is: 58,880.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,518.76 : 108,821.27 = 39,238.16 : x
  2. Step 2: Convert to fraction form
    72,518.76/108,821.27 = 39,238.16/x
  3. Step 3: Cross multiply
    72,518.76x = 108,821.27 × 39,238.16
  4. Step 4: Simplify right side
    72,518.76x = 4,269,945,957.65
  5. Step 5: Solve for x
    x = 4,269,945,957.65/72,518.76
  6. Step 6: Final answer
    x = 58,880.57

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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.