Home / 76,205.89-105,129.12-49,357.36

Finding the Fourth Proportional to 76,205.89, 105,129.12 and 49,357.36

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Solution

The fourth proportional to 76,205.89, 105,129.12 and 49,357.36 is: 68,090.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,205.89 : 105,129.12 = 49,357.36 : x
  2. Step 2: Convert to fraction form
    76,205.89/105,129.12 = 49,357.36/x
  3. Step 3: Cross multiply
    76,205.89x = 105,129.12 × 49,357.36
  4. Step 4: Simplify right side
    76,205.89x = 5,188,895,822.32
  5. Step 5: Solve for x
    x = 5,188,895,822.32/76,205.89
  6. Step 6: Final answer
    x = 68,090.48

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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.