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Finding the Fourth Proportional to 78,986.92, 109,004.88 and 43,179.36

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Solution

The fourth proportional to 78,986.92, 109,004.88 and 43,179.36 is: 59,589.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,986.92 : 109,004.88 = 43,179.36 : x
  2. Step 2: Convert to fraction form
    78,986.92/109,004.88 = 43,179.36/x
  3. Step 3: Cross multiply
    78,986.92x = 109,004.88 × 43,179.36
  4. Step 4: Simplify right side
    78,986.92x = 4,706,760,955.28
  5. Step 5: Solve for x
    x = 4,706,760,955.28/78,986.92
  6. Step 6: Final answer
    x = 59,589.12

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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.