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Finding the Fourth Proportional to 123,072.88, 169,840.36 and 66,484.08

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Solution

The fourth proportional to 123,072.88, 169,840.36 and 66,484.08 is: 91,747.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,072.88 : 169,840.36 = 66,484.08 : x
  2. Step 2: Convert to fraction form
    123,072.88/169,840.36 = 66,484.08/x
  3. Step 3: Cross multiply
    123,072.88x = 169,840.36 × 66,484.08
  4. Step 4: Simplify right side
    123,072.88x = 11,291,680,081.47
  5. Step 5: Solve for x
    x = 11,291,680,081.47/123,072.88
  6. Step 6: Final answer
    x = 91,747.91

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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.