Home / 84,242-126,285.24-31,615.76

Finding the Fourth Proportional to 84,242, 126,285.24 and 31,615.76

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Solution

The fourth proportional to 84,242, 126,285.24 and 31,615.76 is: 47,394.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,242 : 126,285.24 = 31,615.76 : x
  2. Step 2: Convert to fraction form
    84,242/126,285.24 = 31,615.76/x
  3. Step 3: Cross multiply
    84,242x = 126,285.24 × 31,615.76
  4. Step 4: Simplify right side
    84,242x = 3,992,603,839.38
  5. Step 5: Solve for x
    x = 3,992,603,839.38/84,242
  6. Step 6: Final answer
    x = 47,394.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.