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Finding the Fourth Proportional to 72,440.01, 108,529.67 and 68,166.90

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Solution

The fourth proportional to 72,440.01, 108,529.67 and 68,166.90 is: 102,127.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,440.01 : 108,529.67 = 68,166.90 : x
  2. Step 2: Convert to fraction form
    72,440.01/108,529.67 = 68,166.90/x
  3. Step 3: Cross multiply
    72,440.01x = 108,529.67 × 68,166.90
  4. Step 4: Simplify right side
    72,440.01x = 7,398,130,821.09
  5. Step 5: Solve for x
    x = 7,398,130,821.09/72,440.01
  6. Step 6: Final answer
    x = 102,127.69

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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.