Home / 140,912.10-211,555.80-81,790.20

Finding the Fourth Proportional to 140,912.10, 211,555.80 and 81,790.20

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Solution

The fourth proportional to 140,912.10, 211,555.80 and 81,790.20 is: 122,794.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,912.10 : 211,555.80 = 81,790.20 : x
  2. Step 2: Convert to fraction form
    140,912.10/211,555.80 = 81,790.20/x
  3. Step 3: Cross multiply
    140,912.10x = 211,555.80 × 81,790.20
  4. Step 4: Simplify right side
    140,912.10x = 17,303,191,193.16
  5. Step 5: Solve for x
    x = 17,303,191,193.16/140,912.10
  6. Step 6: Final answer
    x = 122,794.22

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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.