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Finding the Fourth Proportional to 79,476.80, 109,676.16 and 43,177.76

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Solution

The fourth proportional to 79,476.80, 109,676.16 and 43,177.76 is: 59,584.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,476.80 : 109,676.16 = 43,177.76 : x
  2. Step 2: Convert to fraction form
    79,476.80/109,676.16 = 43,177.76/x
  3. Step 3: Cross multiply
    79,476.80x = 109,676.16 × 43,177.76
  4. Step 4: Simplify right side
    79,476.80x = 4,735,570,914.20
  5. Step 5: Solve for x
    x = 4,735,570,914.20/79,476.80
  6. Step 6: Final answer
    x = 59,584.32

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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.