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Finding the Fourth Proportional to 115,930.40, 173,852.40 and 80,765.60

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Solution

The fourth proportional to 115,930.40, 173,852.40 and 80,765.60 is: 121,118.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,930.40 : 173,852.40 = 80,765.60 : x
  2. Step 2: Convert to fraction form
    115,930.40/173,852.40 = 80,765.60/x
  3. Step 3: Cross multiply
    115,930.40x = 173,852.40 × 80,765.60
  4. Step 4: Simplify right side
    115,930.40x = 14,041,293,397.44
  5. Step 5: Solve for x
    x = 14,041,293,397.44/115,930.40
  6. Step 6: Final answer
    x = 121,118.30

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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.