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Finding the Fourth Proportional to 79,783.08, 110,128.84 and 71,270.42

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Solution

The fourth proportional to 79,783.08, 110,128.84 and 71,270.42 is: 98,378.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,783.08 : 110,128.84 = 71,270.42 : x
  2. Step 2: Convert to fraction form
    79,783.08/110,128.84 = 71,270.42/x
  3. Step 3: Cross multiply
    79,783.08x = 110,128.84 × 71,270.42
  4. Step 4: Simplify right side
    79,783.08x = 7,848,928,680.91
  5. Step 5: Solve for x
    x = 7,848,928,680.91/79,783.08
  6. Step 6: Final answer
    x = 98,378.36

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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.