Home / 85,435.22-128,032.52-40,408.54

Finding the Fourth Proportional to 85,435.22, 128,032.52 and 40,408.54

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Solution

The fourth proportional to 85,435.22, 128,032.52 and 40,408.54 is: 60,555.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,435.22 : 128,032.52 = 40,408.54 : x
  2. Step 2: Convert to fraction form
    85,435.22/128,032.52 = 40,408.54/x
  3. Step 3: Cross multiply
    85,435.22x = 128,032.52 × 40,408.54
  4. Step 4: Simplify right side
    85,435.22x = 5,173,606,683.60
  5. Step 5: Solve for x
    x = 5,173,606,683.60/85,435.22
  6. Step 6: Final answer
    x = 60,555.90

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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.