Home / 154,965.22-213,835.57-86,989.68

Finding the Fourth Proportional to 154,965.22, 213,835.57 and 86,989.68

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Solution

The fourth proportional to 154,965.22, 213,835.57 and 86,989.68 is: 120,036.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,965.22 : 213,835.57 = 86,989.68 : x
  2. Step 2: Convert to fraction form
    154,965.22/213,835.57 = 86,989.68/x
  3. Step 3: Cross multiply
    154,965.22x = 213,835.57 × 86,989.68
  4. Step 4: Simplify right side
    154,965.22x = 18,601,487,371.97
  5. Step 5: Solve for x
    x = 18,601,487,371.97/154,965.22
  6. Step 6: Final answer
    x = 120,036.53

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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.