Home / 78,138.37-117,207.04-18,973.64

Finding the Fourth Proportional to 78,138.37, 117,207.04 and 18,973.64

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Solution

The fourth proportional to 78,138.37, 117,207.04 and 18,973.64 is: 28,460.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,138.37 : 117,207.04 = 18,973.64 : x
  2. Step 2: Convert to fraction form
    78,138.37/117,207.04 = 18,973.64/x
  3. Step 3: Cross multiply
    78,138.37x = 117,207.04 × 18,973.64
  4. Step 4: Simplify right side
    78,138.37x = 2,223,844,182.43
  5. Step 5: Solve for x
    x = 2,223,844,182.43/78,138.37
  6. Step 6: Final answer
    x = 28,460.33

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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.