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Finding the Fourth Proportional to 70,917.18, 97,866.39 and 39,087.30

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Solution

The fourth proportional to 70,917.18, 97,866.39 and 39,087.30 is: 53,940.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,917.18 : 97,866.39 = 39,087.30 : x
  2. Step 2: Convert to fraction form
    70,917.18/97,866.39 = 39,087.30/x
  3. Step 3: Cross multiply
    70,917.18x = 97,866.39 × 39,087.30
  4. Step 4: Simplify right side
    70,917.18x = 3,825,332,945.85
  5. Step 5: Solve for x
    x = 3,825,332,945.85/70,917.18
  6. Step 6: Final answer
    x = 53,940.85

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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.