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Finding the Fourth Proportional to 342,173.15, 513,249.01 and 142,488.53

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Solution

The fourth proportional to 342,173.15, 513,249.01 and 142,488.53 is: 213,728.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,173.15 : 513,249.01 = 142,488.53 : x
  2. Step 2: Convert to fraction form
    342,173.15/513,249.01 = 142,488.53/x
  3. Step 3: Cross multiply
    342,173.15x = 513,249.01 × 142,488.53
  4. Step 4: Simplify right side
    342,173.15x = 73,132,096,958.86
  5. Step 5: Solve for x
    x = 73,132,096,958.86/342,173.15
  6. Step 6: Final answer
    x = 213,728.33

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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.