Home / 76,985.40-115,485.66-31,997.46

Finding the Fourth Proportional to 76,985.40, 115,485.66 and 31,997.46

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Solution

The fourth proportional to 76,985.40, 115,485.66 and 31,997.46 is: 47,999.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,985.40 : 115,485.66 = 31,997.46 : x
  2. Step 2: Convert to fraction form
    76,985.40/115,485.66 = 31,997.46/x
  3. Step 3: Cross multiply
    76,985.40x = 115,485.66 × 31,997.46
  4. Step 4: Simplify right side
    76,985.40x = 3,695,247,786.42
  5. Step 5: Solve for x
    x = 3,695,247,786.42/76,985.40
  6. Step 6: Final answer
    x = 47,999.33

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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.