Home / 131,479.60-197,219.40-81,875.20

Finding the Fourth Proportional to 131,479.60, 197,219.40 and 81,875.20

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Solution

The fourth proportional to 131,479.60, 197,219.40 and 81,875.20 is: 122,812.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,479.60 : 197,219.40 = 81,875.20 : x
  2. Step 2: Convert to fraction form
    131,479.60/197,219.40 = 81,875.20/x
  3. Step 3: Cross multiply
    131,479.60x = 197,219.40 × 81,875.20
  4. Step 4: Simplify right side
    131,479.60x = 16,147,377,818.88
  5. Step 5: Solve for x
    x = 16,147,377,818.88/131,479.60
  6. Step 6: Final answer
    x = 122,812.80

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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.