Home / 142,864.21-197,157.41-79,198.21

Finding the Fourth Proportional to 142,864.21, 197,157.41 and 79,198.21

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Solution

The fourth proportional to 142,864.21, 197,157.41 and 79,198.21 is: 109,296.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,864.21 : 197,157.41 = 79,198.21 : x
  2. Step 2: Convert to fraction form
    142,864.21/197,157.41 = 79,198.21/x
  3. Step 3: Cross multiply
    142,864.21x = 197,157.41 × 79,198.21
  4. Step 4: Simplify right side
    142,864.21x = 15,614,513,960.24
  5. Step 5: Solve for x
    x = 15,614,513,960.24/142,864.21
  6. Step 6: Final answer
    x = 109,296.19

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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.