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Finding the Fourth Proportional to 91,860.80, 137,791.20 and 80,196.80

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Solution

The fourth proportional to 91,860.80, 137,791.20 and 80,196.80 is: 120,295.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,860.80 : 137,791.20 = 80,196.80 : x
  2. Step 2: Convert to fraction form
    91,860.80/137,791.20 = 80,196.80/x
  3. Step 3: Cross multiply
    91,860.80x = 137,791.20 × 80,196.80
  4. Step 4: Simplify right side
    91,860.80x = 11,050,413,308.16
  5. Step 5: Solve for x
    x = 11,050,413,308.16/91,860.80
  6. Step 6: Final answer
    x = 120,295.20

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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.