Home / 138,630.26-191,358.78-82,041.50

Finding the Fourth Proportional to 138,630.26, 191,358.78 and 82,041.50

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Solution

The fourth proportional to 138,630.26, 191,358.78 and 82,041.50 is: 113,246.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,630.26 : 191,358.78 = 82,041.50 : x
  2. Step 2: Convert to fraction form
    138,630.26/191,358.78 = 82,041.50/x
  3. Step 3: Cross multiply
    138,630.26x = 191,358.78 × 82,041.50
  4. Step 4: Simplify right side
    138,630.26x = 15,699,361,349.37
  5. Step 5: Solve for x
    x = 15,699,361,349.37/138,630.26
  6. Step 6: Final answer
    x = 113,246.28

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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.