Home / 420,751.08-631,132.20-140,268.42

Finding the Fourth Proportional to 420,751.08, 631,132.20 and 140,268.42

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Solution

The fourth proportional to 420,751.08, 631,132.20 and 140,268.42 is: 210,404.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,751.08 : 631,132.20 = 140,268.42 : x
  2. Step 2: Convert to fraction form
    420,751.08/631,132.20 = 140,268.42/x
  3. Step 3: Cross multiply
    420,751.08x = 631,132.20 × 140,268.42
  4. Step 4: Simplify right side
    420,751.08x = 88,527,916,505.12
  5. Step 5: Solve for x
    x = 88,527,916,505.12/420,751.08
  6. Step 6: Final answer
    x = 210,404.49

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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.