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Finding the Fourth Proportional to 126,820.72, 190,245.66 and 74,230.66

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Solution

The fourth proportional to 126,820.72, 190,245.66 and 74,230.66 is: 111,354.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,820.72 : 190,245.66 = 74,230.66 : x
  2. Step 2: Convert to fraction form
    126,820.72/190,245.66 = 74,230.66/x
  3. Step 3: Cross multiply
    126,820.72x = 190,245.66 × 74,230.66
  4. Step 4: Simplify right side
    126,820.72x = 14,122,060,903.94
  5. Step 5: Solve for x
    x = 14,122,060,903.94/126,820.72
  6. Step 6: Final answer
    x = 111,354.52

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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.