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Finding the Fourth Proportional to 79,847.28, 110,199.48 and 66,395.40

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Solution

The fourth proportional to 79,847.28, 110,199.48 and 66,395.40 is: 91,634.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,847.28 : 110,199.48 = 66,395.40 : x
  2. Step 2: Convert to fraction form
    79,847.28/110,199.48 = 66,395.40/x
  3. Step 3: Cross multiply
    79,847.28x = 110,199.48 × 66,395.40
  4. Step 4: Simplify right side
    79,847.28x = 7,316,738,554.39
  5. Step 5: Solve for x
    x = 7,316,738,554.39/79,847.28
  6. Step 6: Final answer
    x = 91,634.16

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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.