Home / 221,820.50-306,090.35-135,803.73

Finding the Fourth Proportional to 221,820.50, 306,090.35 and 135,803.73

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Solution

The fourth proportional to 221,820.50, 306,090.35 and 135,803.73 is: 187,395.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,820.50 : 306,090.35 = 135,803.73 : x
  2. Step 2: Convert to fraction form
    221,820.50/306,090.35 = 135,803.73/x
  3. Step 3: Cross multiply
    221,820.50x = 306,090.35 × 135,803.73
  4. Step 4: Simplify right side
    221,820.50x = 41,568,211,247.01
  5. Step 5: Solve for x
    x = 41,568,211,247.01/221,820.50
  6. Step 6: Final answer
    x = 187,395.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.