Home / 131,691.12-197,148.90-81,610.26

Finding the Fourth Proportional to 131,691.12, 197,148.90 and 81,610.26

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Solution

The fourth proportional to 131,691.12, 197,148.90 and 81,610.26 is: 122,175.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,691.12 : 197,148.90 = 81,610.26 : x
  2. Step 2: Convert to fraction form
    131,691.12/197,148.90 = 81,610.26/x
  3. Step 3: Cross multiply
    131,691.12x = 197,148.90 × 81,610.26
  4. Step 4: Simplify right side
    131,691.12x = 16,089,372,987.71
  5. Step 5: Solve for x
    x = 16,089,372,987.71/131,691.12
  6. Step 6: Final answer
    x = 122,175.08

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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.