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Finding the Fourth Proportional to 115,390.20, 173,108.70 and 65,494.20

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Solution

The fourth proportional to 115,390.20, 173,108.70 and 65,494.20 is: 98,254.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,390.20 : 173,108.70 = 65,494.20 : x
  2. Step 2: Convert to fraction form
    115,390.20/173,108.70 = 65,494.20/x
  3. Step 3: Cross multiply
    115,390.20x = 173,108.70 × 65,494.20
  4. Step 4: Simplify right side
    115,390.20x = 11,337,615,819.54
  5. Step 5: Solve for x
    x = 11,337,615,819.54/115,390.20
  6. Step 6: Final answer
    x = 98,254.58

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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.