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Finding the Fourth Proportional to 115,234.80, 172,852.20 and 102,987.60

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Solution

The fourth proportional to 115,234.80, 172,852.20 and 102,987.60 is: 154,481.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,234.80 : 172,852.20 = 102,987.60 : x
  2. Step 2: Convert to fraction form
    115,234.80/172,852.20 = 102,987.60/x
  3. Step 3: Cross multiply
    115,234.80x = 172,852.20 × 102,987.60
  4. Step 4: Simplify right side
    115,234.80x = 17,801,633,232.72
  5. Step 5: Solve for x
    x = 17,801,633,232.72/115,234.80
  6. Step 6: Final answer
    x = 154,481.40

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1.5x scale

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.