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Finding the Fourth Proportional to 79,447.89, 109,638.99 and 43,638.74

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Solution

The fourth proportional to 79,447.89, 109,638.99 and 43,638.74 is: 60,221.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,447.89 : 109,638.99 = 43,638.74 : x
  2. Step 2: Convert to fraction form
    79,447.89/109,638.99 = 43,638.74/x
  3. Step 3: Cross multiply
    79,447.89x = 109,638.99 × 43,638.74
  4. Step 4: Simplify right side
    79,447.89x = 4,784,507,378.47
  5. Step 5: Solve for x
    x = 4,784,507,378.47/79,447.89
  6. Step 6: Final answer
    x = 60,221.96

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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.