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Finding the Fourth Proportional to 173,128.80, 259,741.80 and 84,385.20

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Solution

The fourth proportional to 173,128.80, 259,741.80 and 84,385.20 is: 126,601.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    173,128.80 : 259,741.80 = 84,385.20 : x
  2. Step 2: Convert to fraction form
    173,128.80/259,741.80 = 84,385.20/x
  3. Step 3: Cross multiply
    173,128.80x = 259,741.80 × 84,385.20
  4. Step 4: Simplify right side
    173,128.80x = 21,918,363,741.36
  5. Step 5: Solve for x
    x = 21,918,363,741.36/173,128.80
  6. Step 6: Final answer
    x = 126,601.49

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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.