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Finding the Fourth Proportional to 123,230.81, 169,980.21 and 80,792.06

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Solution

The fourth proportional to 123,230.81, 169,980.21 and 80,792.06 is: 111,441.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,230.81 : 169,980.21 = 80,792.06 : x
  2. Step 2: Convert to fraction form
    123,230.81/169,980.21 = 80,792.06/x
  3. Step 3: Cross multiply
    123,230.81x = 169,980.21 × 80,792.06
  4. Step 4: Simplify right side
    123,230.81x = 13,733,051,325.13
  5. Step 5: Solve for x
    x = 13,733,051,325.13/123,230.81
  6. Step 6: Final answer
    x = 111,441.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.