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Finding the Fourth Proportional to 79,031.52, 109,170 and 63,228.96

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Solution

The fourth proportional to 79,031.52, 109,170 and 63,228.96 is: 87,341.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,031.52 : 109,170 = 63,228.96 : x
  2. Step 2: Convert to fraction form
    79,031.52/109,170 = 63,228.96/x
  3. Step 3: Cross multiply
    79,031.52x = 109,170 × 63,228.96
  4. Step 4: Simplify right side
    79,031.52x = 6,902,705,563.20
  5. Step 5: Solve for x
    x = 6,902,705,563.20/79,031.52
  6. Step 6: Final answer
    x = 87,341.17

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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.