Home / 131,315.40-197,118.90-81,451.80

Finding the Fourth Proportional to 131,315.40, 197,118.90 and 81,451.80

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Solution

The fourth proportional to 131,315.40, 197,118.90 and 81,451.80 is: 122,268.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,315.40 : 197,118.90 = 81,451.80 : x
  2. Step 2: Convert to fraction form
    131,315.40/197,118.90 = 81,451.80/x
  3. Step 3: Cross multiply
    131,315.40x = 197,118.90 × 81,451.80
  4. Step 4: Simplify right side
    131,315.40x = 16,055,689,219.02
  5. Step 5: Solve for x
    x = 16,055,689,219.02/131,315.40
  6. Step 6: Final answer
    x = 122,268.14

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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.