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Finding the Fourth Proportional to 111,650.40, 167,617.71 and 72,371.88

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Solution

The fourth proportional to 111,650.40, 167,617.71 and 72,371.88 is: 108,649.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,650.40 : 167,617.71 = 72,371.88 : x
  2. Step 2: Convert to fraction form
    111,650.40/167,617.71 = 72,371.88/x
  3. Step 3: Cross multiply
    111,650.40x = 167,617.71 × 72,371.88
  4. Step 4: Simplify right side
    111,650.40x = 12,130,808,793.99
  5. Step 5: Solve for x
    x = 12,130,808,793.99/111,650.40
  6. Step 6: Final answer
    x = 108,649.94

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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.