Home / 142,660.80-196,869.60-78,998.40

Finding the Fourth Proportional to 142,660.80, 196,869.60 and 78,998.40

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Solution

The fourth proportional to 142,660.80, 196,869.60 and 78,998.40 is: 109,016.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,660.80 : 196,869.60 = 78,998.40 : x
  2. Step 2: Convert to fraction form
    142,660.80/196,869.60 = 78,998.40/x
  3. Step 3: Cross multiply
    142,660.80x = 196,869.60 × 78,998.40
  4. Step 4: Simplify right side
    142,660.80x = 15,552,383,408.64
  5. Step 5: Solve for x
    x = 15,552,383,408.64/142,660.80
  6. Step 6: Final answer
    x = 109,016.52

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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.