Home / 131,028.60-196,542.90-81,424.20

Finding the Fourth Proportional to 131,028.60, 196,542.90 and 81,424.20

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Solution

The fourth proportional to 131,028.60, 196,542.90 and 81,424.20 is: 122,136.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,028.60 : 196,542.90 = 81,424.20 : x
  2. Step 2: Convert to fraction form
    131,028.60/196,542.90 = 81,424.20/x
  3. Step 3: Cross multiply
    131,028.60x = 196,542.90 × 81,424.20
  4. Step 4: Simplify right side
    131,028.60x = 16,003,348,398.18
  5. Step 5: Solve for x
    x = 16,003,348,398.18/131,028.60
  6. Step 6: Final answer
    x = 122,136.30

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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.