Home / 76,131.12-114,161.60-31,731.36

Finding the Fourth Proportional to 76,131.12, 114,161.60 and 31,731.36

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Solution

The fourth proportional to 76,131.12, 114,161.60 and 31,731.36 is: 47,582.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,131.12 : 114,161.60 = 31,731.36 : x
  2. Step 2: Convert to fraction form
    76,131.12/114,161.60 = 31,731.36/x
  3. Step 3: Cross multiply
    76,131.12x = 114,161.60 × 31,731.36
  4. Step 4: Simplify right side
    76,131.12x = 3,622,502,827.78
  5. Step 5: Solve for x
    x = 3,622,502,827.78/76,131.12
  6. Step 6: Final answer
    x = 47,582.42

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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.