Home / 87,780.32-131,639.36-31,605.36

Finding the Fourth Proportional to 87,780.32, 131,639.36 and 31,605.36

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Solution

The fourth proportional to 87,780.32, 131,639.36 and 31,605.36 is: 47,396.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,780.32 : 131,639.36 = 31,605.36 : x
  2. Step 2: Convert to fraction form
    87,780.32/131,639.36 = 31,605.36/x
  3. Step 3: Cross multiply
    87,780.32x = 131,639.36 × 31,605.36
  4. Step 4: Simplify right side
    87,780.32x = 4,160,509,362.97
  5. Step 5: Solve for x
    x = 4,160,509,362.97/87,780.32
  6. Step 6: Final answer
    x = 47,396.84

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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.