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Finding the Fourth Proportional to 115,016.80, 172,525.20 and 31,910.80

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Solution

The fourth proportional to 115,016.80, 172,525.20 and 31,910.80 is: 47,866.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,016.80 : 172,525.20 = 31,910.80 : x
  2. Step 2: Convert to fraction form
    115,016.80/172,525.20 = 31,910.80/x
  3. Step 3: Cross multiply
    115,016.80x = 172,525.20 × 31,910.80
  4. Step 4: Simplify right side
    115,016.80x = 5,505,417,152.16
  5. Step 5: Solve for x
    x = 5,505,417,152.16/115,016.80
  6. Step 6: Final answer
    x = 47,866.20

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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.