Home / 78,157.81-117,236.36-18,993.59

Finding the Fourth Proportional to 78,157.81, 117,236.36 and 18,993.59

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Solution

The fourth proportional to 78,157.81, 117,236.36 and 18,993.59 is: 28,490.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,157.81 : 117,236.36 = 18,993.59 : x
  2. Step 2: Convert to fraction form
    78,157.81/117,236.36 = 18,993.59/x
  3. Step 3: Cross multiply
    78,157.81x = 117,236.36 × 18,993.59
  4. Step 4: Simplify right side
    78,157.81x = 2,226,739,255.87
  5. Step 5: Solve for x
    x = 2,226,739,255.87/78,157.81
  6. Step 6: Final answer
    x = 28,490.30

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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.