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Finding the Fourth Proportional to 78,149.88, 117,224.01 and 18,986.27

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Solution

The fourth proportional to 78,149.88, 117,224.01 and 18,986.27 is: 28,479.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,149.88 : 117,224.01 = 18,986.27 : x
  2. Step 2: Convert to fraction form
    78,149.88/117,224.01 = 18,986.27/x
  3. Step 3: Cross multiply
    78,149.88x = 117,224.01 × 18,986.27
  4. Step 4: Simplify right side
    78,149.88x = 2,225,646,118.22
  5. Step 5: Solve for x
    x = 2,225,646,118.22/78,149.88
  6. Step 6: Final answer
    x = 28,479.20

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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.