Home / 81,679.08-122,486.90-31,752.57

Finding the Fourth Proportional to 81,679.08, 122,486.90 and 31,752.57

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Solution

The fourth proportional to 81,679.08, 122,486.90 and 31,752.57 is: 47,616.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,679.08 : 122,486.90 = 31,752.57 : x
  2. Step 2: Convert to fraction form
    81,679.08/122,486.90 = 31,752.57/x
  3. Step 3: Cross multiply
    81,679.08x = 122,486.90 × 31,752.57
  4. Step 4: Simplify right side
    81,679.08x = 3,889,273,707.57
  5. Step 5: Solve for x
    x = 3,889,273,707.57/81,679.08
  6. Step 6: Final answer
    x = 47,616.52

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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.