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Finding the Fourth Proportional to 72,842.76, 100,222.44 and 56,899.56

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Solution

The fourth proportional to 72,842.76, 100,222.44 and 56,899.56 is: 78,286.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,842.76 : 100,222.44 = 56,899.56 : x
  2. Step 2: Convert to fraction form
    72,842.76/100,222.44 = 56,899.56/x
  3. Step 3: Cross multiply
    72,842.76x = 100,222.44 × 56,899.56
  4. Step 4: Simplify right side
    72,842.76x = 5,702,612,738.13
  5. Step 5: Solve for x
    x = 5,702,612,738.13/72,842.76
  6. Step 6: Final answer
    x = 78,286.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.