Home / 142,934.81-197,245.46-78,403.12

Finding the Fourth Proportional to 142,934.81, 197,245.46 and 78,403.12

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Solution

The fourth proportional to 142,934.81, 197,245.46 and 78,403.12 is: 108,193.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,934.81 : 197,245.46 = 78,403.12 : x
  2. Step 2: Convert to fraction form
    142,934.81/197,245.46 = 78,403.12/x
  3. Step 3: Cross multiply
    142,934.81x = 197,245.46 × 78,403.12
  4. Step 4: Simplify right side
    142,934.81x = 15,464,659,172.73
  5. Step 5: Solve for x
    x = 15,464,659,172.73/142,934.81
  6. Step 6: Final answer
    x = 108,193.80

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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.