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Finding the Fourth Proportional to 79,449.54, 109,640.84 and 43,638.63

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Solution

The fourth proportional to 79,449.54, 109,640.84 and 43,638.63 is: 60,221.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,449.54 : 109,640.84 = 43,638.63 : x
  2. Step 2: Convert to fraction form
    79,449.54/109,640.84 = 43,638.63/x
  3. Step 3: Cross multiply
    79,449.54x = 109,640.84 × 43,638.63
  4. Step 4: Simplify right side
    79,449.54x = 4,784,575,831.46
  5. Step 5: Solve for x
    x = 4,784,575,831.46/79,449.54
  6. Step 6: Final answer
    x = 60,221.57

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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.