Home / 78,293.13-117,439.37-28,361.54

Finding the Fourth Proportional to 78,293.13, 117,439.37 and 28,361.54

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Solution

The fourth proportional to 78,293.13, 117,439.37 and 28,361.54 is: 42,542.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,293.13 : 117,439.37 = 28,361.54 : x
  2. Step 2: Convert to fraction form
    78,293.13/117,439.37 = 28,361.54/x
  3. Step 3: Cross multiply
    78,293.13x = 117,439.37 × 28,361.54
  4. Step 4: Simplify right side
    78,293.13x = 3,330,761,389.83
  5. Step 5: Solve for x
    x = 3,330,761,389.83/78,293.13
  6. Step 6: Final answer
    x = 42,542.19

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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.