Home / 142,913.80-197,208.12-79,251.40

Finding the Fourth Proportional to 142,913.80, 197,208.12 and 79,251.40

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Solution

The fourth proportional to 142,913.80, 197,208.12 and 79,251.40 is: 109,359.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,913.80 : 197,208.12 = 79,251.40 : x
  2. Step 2: Convert to fraction form
    142,913.80/197,208.12 = 79,251.40/x
  3. Step 3: Cross multiply
    142,913.80x = 197,208.12 × 79,251.40
  4. Step 4: Simplify right side
    142,913.80x = 15,629,019,601.37
  5. Step 5: Solve for x
    x = 15,629,019,601.37/142,913.80
  6. Step 6: Final answer
    x = 109,359.77

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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.