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Finding the Fourth Proportional to 120,892.59, 166,853.04 and 69,897.21

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Solution

The fourth proportional to 120,892.59, 166,853.04 and 69,897.21 is: 96,470.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,892.59 : 166,853.04 = 69,897.21 : x
  2. Step 2: Convert to fraction form
    120,892.59/166,853.04 = 69,897.21/x
  3. Step 3: Cross multiply
    120,892.59x = 166,853.04 × 69,897.21
  4. Step 4: Simplify right side
    120,892.59x = 11,662,561,976.02
  5. Step 5: Solve for x
    x = 11,662,561,976.02/120,892.59
  6. Step 6: Final answer
    x = 96,470.45

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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.