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Finding the Fourth Proportional to 79,486.81, 109,691.76 and 43,679.13

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Solution

The fourth proportional to 79,486.81, 109,691.76 and 43,679.13 is: 60,277.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,486.81 : 109,691.76 = 43,679.13 : x
  2. Step 2: Convert to fraction form
    79,486.81/109,691.76 = 43,679.13/x
  3. Step 3: Cross multiply
    79,486.81x = 109,691.76 × 43,679.13
  4. Step 4: Simplify right side
    79,486.81x = 4,791,240,644.97
  5. Step 5: Solve for x
    x = 4,791,240,644.97/79,486.81
  6. Step 6: Final answer
    x = 60,277.18

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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.