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Finding the Fourth Proportional to 110,672.72, 166,008.72 and 66,312.80

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Solution

The fourth proportional to 110,672.72, 166,008.72 and 66,312.80 is: 99,468.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,672.72 : 166,008.72 = 66,312.80 : x
  2. Step 2: Convert to fraction form
    110,672.72/166,008.72 = 66,312.80/x
  3. Step 3: Cross multiply
    110,672.72x = 166,008.72 × 66,312.80
  4. Step 4: Simplify right side
    110,672.72x = 11,008,503,047.62
  5. Step 5: Solve for x
    x = 11,008,503,047.62/110,672.72
  6. Step 6: Final answer
    x = 99,468.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.