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Finding the Fourth Proportional to 123,054.42, 169,815.21 and 66,465.80

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Solution

The fourth proportional to 123,054.42, 169,815.21 and 66,465.80 is: 91,722.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,054.42 : 169,815.21 = 66,465.80 : x
  2. Step 2: Convert to fraction form
    123,054.42/169,815.21 = 66,465.80/x
  3. Step 3: Cross multiply
    123,054.42x = 169,815.21 × 66,465.80
  4. Step 4: Simplify right side
    123,054.42x = 11,286,902,935.74
  5. Step 5: Solve for x
    x = 11,286,902,935.74/123,054.42
  6. Step 6: Final answer
    x = 91,722.86

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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.