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Finding the Fourth Proportional to 250,172.79, 345,231.77 and 142,740.87

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Solution

The fourth proportional to 250,172.79, 345,231.77 and 142,740.87 is: 196,978.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    250,172.79 : 345,231.77 = 142,740.87 : x
  2. Step 2: Convert to fraction form
    250,172.79/345,231.77 = 142,740.87/x
  3. Step 3: Cross multiply
    250,172.79x = 345,231.77 × 142,740.87
  4. Step 4: Simplify right side
    250,172.79x = 49,278,682,487.74
  5. Step 5: Solve for x
    x = 49,278,682,487.74/250,172.79
  6. Step 6: Final answer
    x = 196,978.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.