Home / 143,004.94-197,359.07-78,486.64

Finding the Fourth Proportional to 143,004.94, 197,359.07 and 78,486.64

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Solution

The fourth proportional to 143,004.94, 197,359.07 and 78,486.64 is: 108,318.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,004.94 : 197,359.07 = 78,486.64 : x
  2. Step 2: Convert to fraction form
    143,004.94/197,359.07 = 78,486.64/x
  3. Step 3: Cross multiply
    143,004.94x = 197,359.07 × 78,486.64
  4. Step 4: Simplify right side
    143,004.94x = 15,490,049,885.39
  5. Step 5: Solve for x
    x = 15,490,049,885.39/143,004.94
  6. Step 6: Final answer
    x = 108,318.29

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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.