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Finding the Fourth Proportional to 123,145.79, 169,941.11 and 66,557.16

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Solution

The fourth proportional to 123,145.79, 169,941.11 and 66,557.16 is: 91,848.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,145.79 : 169,941.11 = 66,557.16 : x
  2. Step 2: Convert to fraction form
    123,145.79/169,941.11 = 66,557.16/x
  3. Step 3: Cross multiply
    123,145.79x = 169,941.11 × 66,557.16
  4. Step 4: Simplify right side
    123,145.79x = 11,310,797,316.06
  5. Step 5: Solve for x
    x = 11,310,797,316.06/123,145.79
  6. Step 6: Final answer
    x = 91,848.84

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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.