Home / 142,811.61-197,072.43-82,378.64

Finding the Fourth Proportional to 142,811.61, 197,072.43 and 82,378.64

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Solution

The fourth proportional to 142,811.61, 197,072.43 and 82,378.64 is: 113,678.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,811.61 : 197,072.43 = 82,378.64 : x
  2. Step 2: Convert to fraction form
    142,811.61/197,072.43 = 82,378.64/x
  3. Step 3: Cross multiply
    142,811.61x = 197,072.43 × 82,378.64
  4. Step 4: Simplify right side
    142,811.61x = 16,234,558,948.66
  5. Step 5: Solve for x
    x = 16,234,558,948.66/142,811.61
  6. Step 6: Final answer
    x = 113,678.15

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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.