Home / 78,091.65-117,136.44-18,927.83

Finding the Fourth Proportional to 78,091.65, 117,136.44 and 18,927.83

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Solution

The fourth proportional to 78,091.65, 117,136.44 and 18,927.83 is: 28,391.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,091.65 : 117,136.44 = 18,927.83 : x
  2. Step 2: Convert to fraction form
    78,091.65/117,136.44 = 18,927.83/x
  3. Step 3: Cross multiply
    78,091.65x = 117,136.44 × 18,927.83
  4. Step 4: Simplify right side
    78,091.65x = 2,217,138,915.97
  5. Step 5: Solve for x
    x = 2,217,138,915.97/78,091.65
  6. Step 6: Final answer
    x = 28,391.50

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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.