Home / 131,467.20-197,085.60-78,820.80

Finding the Fourth Proportional to 131,467.20, 197,085.60 and 78,820.80

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Solution

The fourth proportional to 131,467.20, 197,085.60 and 78,820.80 is: 118,162.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,467.20 : 197,085.60 = 78,820.80 : x
  2. Step 2: Convert to fraction form
    131,467.20/197,085.60 = 78,820.80/x
  3. Step 3: Cross multiply
    131,467.20x = 197,085.60 × 78,820.80
  4. Step 4: Simplify right side
    131,467.20x = 15,534,444,660.48
  5. Step 5: Solve for x
    x = 15,534,444,660.48/131,467.20
  6. Step 6: Final answer
    x = 118,162.13

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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.