Home / 78,588.09-117,880.96-19,423.75

Finding the Fourth Proportional to 78,588.09, 117,880.96 and 19,423.75

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Solution

The fourth proportional to 78,588.09, 117,880.96 and 19,423.75 is: 29,135.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,588.09 : 117,880.96 = 19,423.75 : x
  2. Step 2: Convert to fraction form
    78,588.09/117,880.96 = 19,423.75/x
  3. Step 3: Cross multiply
    78,588.09x = 117,880.96 × 19,423.75
  4. Step 4: Simplify right side
    78,588.09x = 2,289,690,296.80
  5. Step 5: Solve for x
    x = 2,289,690,296.80/78,588.09
  6. Step 6: Final answer
    x = 29,135.33

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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.