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Finding the Fourth Proportional to 78,745.80, 118,136.52 and 28,825.68

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Solution

The fourth proportional to 78,745.80, 118,136.52 and 28,825.68 is: 43,245.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,745.80 : 118,136.52 = 28,825.68 : x
  2. Step 2: Convert to fraction form
    78,745.80/118,136.52 = 28,825.68/x
  3. Step 3: Cross multiply
    78,745.80x = 118,136.52 × 28,825.68
  4. Step 4: Simplify right side
    78,745.80x = 3,405,365,521.83
  5. Step 5: Solve for x
    x = 3,405,365,521.83/78,745.80
  6. Step 6: Final answer
    x = 43,245.04

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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.