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Finding the Fourth Proportional to 123,164.66, 169,968.47 and 72,207.56

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Solution

The fourth proportional to 123,164.66, 169,968.47 and 72,207.56 is: 99,647.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,164.66 : 169,968.47 = 72,207.56 : x
  2. Step 2: Convert to fraction form
    123,164.66/169,968.47 = 72,207.56/x
  3. Step 3: Cross multiply
    123,164.66x = 169,968.47 × 72,207.56
  4. Step 4: Simplify right side
    123,164.66x = 12,273,007,284.75
  5. Step 5: Solve for x
    x = 12,273,007,284.75/123,164.66
  6. Step 6: Final answer
    x = 99,647.15

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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.