Home / 81,097.47-121,315.73-68,539.23

Finding the Fourth Proportional to 81,097.47, 121,315.73 and 68,539.23

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Solution

The fourth proportional to 81,097.47, 121,315.73 and 68,539.23 is: 102,529.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,097.47 : 121,315.73 = 68,539.23 : x
  2. Step 2: Convert to fraction form
    81,097.47/121,315.73 = 68,539.23/x
  3. Step 3: Cross multiply
    81,097.47x = 121,315.73 × 68,539.23
  4. Step 4: Simplify right side
    81,097.47x = 8,314,886,378.39
  5. Step 5: Solve for x
    x = 8,314,886,378.39/81,097.47
  6. Step 6: Final answer
    x = 102,529.54

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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.