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Finding the Fourth Proportional to 115,339.20, 173,008.80 and 92,011.20

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Solution

The fourth proportional to 115,339.20, 173,008.80 and 92,011.20 is: 138,016.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,339.20 : 173,008.80 = 92,011.20 : x
  2. Step 2: Convert to fraction form
    115,339.20/173,008.80 = 92,011.20/x
  3. Step 3: Cross multiply
    115,339.20x = 173,008.80 × 92,011.20
  4. Step 4: Simplify right side
    115,339.20x = 15,918,747,298.56
  5. Step 5: Solve for x
    x = 15,918,747,298.56/115,339.20
  6. Step 6: Final answer
    x = 138,016.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.