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Finding the Fourth Proportional to 123,054.40, 169,815.18 and 66,465.76

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Solution

The fourth proportional to 123,054.40, 169,815.18 and 66,465.76 is: 91,722.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,054.40 : 169,815.18 = 66,465.76 : x
  2. Step 2: Convert to fraction form
    123,054.40/169,815.18 = 66,465.76/x
  3. Step 3: Cross multiply
    123,054.40x = 169,815.18 × 66,465.76
  4. Step 4: Simplify right side
    123,054.40x = 11,286,894,998.24
  5. Step 5: Solve for x
    x = 11,286,894,998.24/123,054.40
  6. Step 6: Final answer
    x = 91,722.81

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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.