Home / 142,783.92-197,038.68-79,121.52

Finding the Fourth Proportional to 142,783.92, 197,038.68 and 79,121.52

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Solution

The fourth proportional to 142,783.92, 197,038.68 and 79,121.52 is: 109,185.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,783.92 : 197,038.68 = 79,121.52 : x
  2. Step 2: Convert to fraction form
    142,783.92/197,038.68 = 79,121.52/x
  3. Step 3: Cross multiply
    142,783.92x = 197,038.68 × 79,121.52
  4. Step 4: Simplify right side
    142,783.92x = 15,589,999,860.39
  5. Step 5: Solve for x
    x = 15,589,999,860.39/142,783.92
  6. Step 6: Final answer
    x = 109,185.96

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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.