Home / 140,900.10-211,537.80-81,778.20

Finding the Fourth Proportional to 140,900.10, 211,537.80 and 81,778.20

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Solution

The fourth proportional to 140,900.10, 211,537.80 and 81,778.20 is: 122,776.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,900.10 : 211,537.80 = 81,778.20 : x
  2. Step 2: Convert to fraction form
    140,900.10/211,537.80 = 81,778.20/x
  3. Step 3: Cross multiply
    140,900.10x = 211,537.80 × 81,778.20
  4. Step 4: Simplify right side
    140,900.10x = 17,299,180,515.96
  5. Step 5: Solve for x
    x = 17,299,180,515.96/140,900.10
  6. Step 6: Final answer
    x = 122,776.21

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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.