Home / 78,122.33-117,183.63-28,237.64

Finding the Fourth Proportional to 78,122.33, 117,183.63 and 28,237.64

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Solution

The fourth proportional to 78,122.33, 117,183.63 and 28,237.64 is: 42,356.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,122.33 : 117,183.63 = 28,237.64 : x
  2. Step 2: Convert to fraction form
    78,122.33/117,183.63 = 28,237.64/x
  3. Step 3: Cross multiply
    78,122.33x = 117,183.63 × 28,237.64
  4. Step 4: Simplify right side
    78,122.33x = 3,308,989,157.83
  5. Step 5: Solve for x
    x = 3,308,989,157.83/78,122.33
  6. Step 6: Final answer
    x = 42,356.51

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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.