Home / 81,507.24-112,500-49,693.68

Finding the Fourth Proportional to 81,507.24, 112,500 and 49,693.68

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Solution

The fourth proportional to 81,507.24, 112,500 and 49,693.68 is: 68,589.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,507.24 : 112,500 = 49,693.68 : x
  2. Step 2: Convert to fraction form
    81,507.24/112,500 = 49,693.68/x
  3. Step 3: Cross multiply
    81,507.24x = 112,500 × 49,693.68
  4. Step 4: Simplify right side
    81,507.24x = 5,590,539,000
  5. Step 5: Solve for x
    x = 5,590,539,000/81,507.24
  6. Step 6: Final answer
    x = 68,589.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.