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Finding the Fourth Proportional to 111,347.40, 166,632.30 and 77,910.60

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Solution

The fourth proportional to 111,347.40, 166,632.30 and 77,910.60 is: 116,593.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,347.40 : 166,632.30 = 77,910.60 : x
  2. Step 2: Convert to fraction form
    111,347.40/166,632.30 = 77,910.60/x
  3. Step 3: Cross multiply
    111,347.40x = 166,632.30 × 77,910.60
  4. Step 4: Simplify right side
    111,347.40x = 12,982,422,472.38
  5. Step 5: Solve for x
    x = 12,982,422,472.38/111,347.40
  6. Step 6: Final answer
    x = 116,593.85

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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.