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Finding the Fourth Proportional to 111,330.40, 166,995.60 and 104,915.20

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Solution

The fourth proportional to 111,330.40, 166,995.60 and 104,915.20 is: 157,372.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,330.40 : 166,995.60 = 104,915.20 : x
  2. Step 2: Convert to fraction form
    111,330.40/166,995.60 = 104,915.20/x
  3. Step 3: Cross multiply
    111,330.40x = 166,995.60 × 104,915.20
  4. Step 4: Simplify right side
    111,330.40x = 17,520,376,773.12
  5. Step 5: Solve for x
    x = 17,520,376,773.12/111,330.40
  6. Step 6: Final answer
    x = 157,372.80

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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.