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Finding the Fourth Proportional to 140,505.80, 210,321.30 and 136,131.80

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Solution

The fourth proportional to 140,505.80, 210,321.30 and 136,131.80 is: 203,773.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,505.80 : 210,321.30 = 136,131.80 : x
  2. Step 2: Convert to fraction form
    140,505.80/210,321.30 = 136,131.80/x
  3. Step 3: Cross multiply
    140,505.80x = 210,321.30 × 136,131.80
  4. Step 4: Simplify right side
    140,505.80x = 28,631,417,147.34
  5. Step 5: Solve for x
    x = 28,631,417,147.34/140,505.80
  6. Step 6: Final answer
    x = 203,773.92

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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.