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Finding the Fourth Proportional to 111,372.40, 166,572.60 and 99,611.20

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Solution

The fourth proportional to 111,372.40, 166,572.60 and 99,611.20 is: 148,982.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,372.40 : 166,572.60 = 99,611.20 : x
  2. Step 2: Convert to fraction form
    111,372.40/166,572.60 = 99,611.20/x
  3. Step 3: Cross multiply
    111,372.40x = 166,572.60 × 99,611.20
  4. Step 4: Simplify right side
    111,372.40x = 16,592,496,573.12
  5. Step 5: Solve for x
    x = 16,592,496,573.12/111,372.40
  6. Step 6: Final answer
    x = 148,982.12

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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.