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Finding the Fourth Proportional to 112,112.40, 167,974.20 and 72,649.20

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Solution

The fourth proportional to 112,112.40, 167,974.20 and 72,649.20 is: 108,847.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,112.40 : 167,974.20 = 72,649.20 : x
  2. Step 2: Convert to fraction form
    112,112.40/167,974.20 = 72,649.20/x
  3. Step 3: Cross multiply
    112,112.40x = 167,974.20 × 72,649.20
  4. Step 4: Simplify right side
    112,112.40x = 12,203,191,250.64
  5. Step 5: Solve for x
    x = 12,203,191,250.64/112,112.40
  6. Step 6: Final answer
    x = 108,847.83

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1.5x scale

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.