Home / 115,431.75-159,362.07-87,992.46

Finding the Fourth Proportional to 115,431.75, 159,362.07 and 87,992.46

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Solution

The fourth proportional to 115,431.75, 159,362.07 and 87,992.46 is: 121,480.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,431.75 : 159,362.07 = 87,992.46 : x
  2. Step 2: Convert to fraction form
    115,431.75/159,362.07 = 87,992.46/x
  3. Step 3: Cross multiply
    115,431.75x = 159,362.07 × 87,992.46
  4. Step 4: Simplify right side
    115,431.75x = 14,022,660,569.99
  5. Step 5: Solve for x
    x = 14,022,660,569.99/115,431.75
  6. Step 6: Final answer
    x = 121,480.10

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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.