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Finding the Fourth Proportional to 120,572.84, 166,389.84 and 66,865.79

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Solution

The fourth proportional to 120,572.84, 166,389.84 and 66,865.79 is: 92,274.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,572.84 : 166,389.84 = 66,865.79 : x
  2. Step 2: Convert to fraction form
    120,572.84/166,389.84 = 66,865.79/x
  3. Step 3: Cross multiply
    120,572.84x = 166,389.84 × 66,865.79
  4. Step 4: Simplify right side
    120,572.84x = 11,125,787,267.62
  5. Step 5: Solve for x
    x = 11,125,787,267.62/120,572.84
  6. Step 6: Final answer
    x = 92,274.41

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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.