Home / 78,079.23-117,118.54-18,914.80

Finding the Fourth Proportional to 78,079.23, 117,118.54 and 18,914.80

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Solution

The fourth proportional to 78,079.23, 117,118.54 and 18,914.80 is: 28,372.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,079.23 : 117,118.54 = 18,914.80 : x
  2. Step 2: Convert to fraction form
    78,079.23/117,118.54 = 18,914.80/x
  3. Step 3: Cross multiply
    78,079.23x = 117,118.54 × 18,914.80
  4. Step 4: Simplify right side
    78,079.23x = 2,215,273,760.39
  5. Step 5: Solve for x
    x = 2,215,273,760.39/78,079.23
  6. Step 6: Final answer
    x = 28,372.13

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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.