Home / 78,091.85-117,136.73-18,928.04

Finding the Fourth Proportional to 78,091.85, 117,136.73 and 18,928.04

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Solution

The fourth proportional to 78,091.85, 117,136.73 and 18,928.04 is: 28,391.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,091.85 : 117,136.73 = 18,928.04 : x
  2. Step 2: Convert to fraction form
    78,091.85/117,136.73 = 18,928.04/x
  3. Step 3: Cross multiply
    78,091.85x = 117,136.73 × 18,928.04
  4. Step 4: Simplify right side
    78,091.85x = 2,217,168,030.59
  5. Step 5: Solve for x
    x = 2,217,168,030.59/78,091.85
  6. Step 6: Final answer
    x = 28,391.80

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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.