Home / 142,790.68-197,048.78-78,259.42

Finding the Fourth Proportional to 142,790.68, 197,048.78 and 78,259.42

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Solution

The fourth proportional to 142,790.68, 197,048.78 and 78,259.42 is: 107,996.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,790.68 : 197,048.78 = 78,259.42 : x
  2. Step 2: Convert to fraction form
    142,790.68/197,048.78 = 78,259.42/x
  3. Step 3: Cross multiply
    142,790.68x = 197,048.78 × 78,259.42
  4. Step 4: Simplify right side
    142,790.68x = 15,420,923,234.51
  5. Step 5: Solve for x
    x = 15,420,923,234.51/142,790.68
  6. Step 6: Final answer
    x = 107,996.71

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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.