Home / 115,147.80-172,909.26-71,054.64

Finding the Fourth Proportional to 115,147.80, 172,909.26 and 71,054.64

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Solution

The fourth proportional to 115,147.80, 172,909.26 and 71,054.64 is: 106,697.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,147.80 : 172,909.26 = 71,054.64 : x
  2. Step 2: Convert to fraction form
    115,147.80/172,909.26 = 71,054.64/x
  3. Step 3: Cross multiply
    115,147.80x = 172,909.26 × 71,054.64
  4. Step 4: Simplify right side
    115,147.80x = 12,286,005,221.97
  5. Step 5: Solve for x
    x = 12,286,005,221.97/115,147.80
  6. Step 6: Final answer
    x = 106,697.70

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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.