Home / 85,408.23-128,112.59-26,243.81

Finding the Fourth Proportional to 85,408.23, 128,112.59 and 26,243.81

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Solution

The fourth proportional to 85,408.23, 128,112.59 and 26,243.81 is: 39,365.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,408.23 : 128,112.59 = 26,243.81 : x
  2. Step 2: Convert to fraction form
    85,408.23/128,112.59 = 26,243.81/x
  3. Step 3: Cross multiply
    85,408.23x = 128,112.59 × 26,243.81
  4. Step 4: Simplify right side
    85,408.23x = 3,362,162,470.57
  5. Step 5: Solve for x
    x = 3,362,162,470.57/85,408.23
  6. Step 6: Final answer
    x = 39,365.79

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1.5x scale

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.