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Finding the Fourth Proportional to 120,681.81, 166,532.90 and 66,963.42

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Solution

The fourth proportional to 120,681.81, 166,532.90 and 66,963.42 is: 92,405.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,681.81 : 166,532.90 = 66,963.42 : x
  2. Step 2: Convert to fraction form
    120,681.81/166,532.90 = 66,963.42/x
  3. Step 3: Cross multiply
    120,681.81x = 166,532.90 × 66,963.42
  4. Step 4: Simplify right side
    120,681.81x = 11,151,612,191.70
  5. Step 5: Solve for x
    x = 11,151,612,191.70/120,681.81
  6. Step 6: Final answer
    x = 92,405.08

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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.