Home / 87,678.35-131,485.19-31,503.36

Finding the Fourth Proportional to 87,678.35, 131,485.19 and 31,503.36

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Solution

The fourth proportional to 87,678.35, 131,485.19 and 31,503.36 is: 47,243.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,678.35 : 131,485.19 = 31,503.36 : x
  2. Step 2: Convert to fraction form
    87,678.35/131,485.19 = 31,503.36/x
  3. Step 3: Cross multiply
    87,678.35x = 131,485.19 × 31,503.36
  4. Step 4: Simplify right side
    87,678.35x = 4,142,225,117.72
  5. Step 5: Solve for x
    x = 4,142,225,117.72/87,678.35
  6. Step 6: Final answer
    x = 47,243.42

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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.