Home / 81,783.52-122,625.03-31,805.35

Finding the Fourth Proportional to 81,783.52, 122,625.03 and 31,805.35

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Solution

The fourth proportional to 81,783.52, 122,625.03 and 31,805.35 is: 47,688.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,783.52 : 122,625.03 = 31,805.35 : x
  2. Step 2: Convert to fraction form
    81,783.52/122,625.03 = 31,805.35/x
  3. Step 3: Cross multiply
    81,783.52x = 122,625.03 × 31,805.35
  4. Step 4: Simplify right side
    81,783.52x = 3,900,131,810.62
  5. Step 5: Solve for x
    x = 3,900,131,810.62/81,783.52
  6. Step 6: Final answer
    x = 47,688.48

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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.