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Finding the Fourth Proportional to 91,907.97, 137,862.07 and 28,728.44

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Solution

The fourth proportional to 91,907.97, 137,862.07 and 28,728.44 is: 43,092.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,907.97 : 137,862.07 = 28,728.44 : x
  2. Step 2: Convert to fraction form
    91,907.97/137,862.07 = 28,728.44/x
  3. Step 3: Cross multiply
    91,907.97x = 137,862.07 × 28,728.44
  4. Step 4: Simplify right side
    91,907.97x = 3,960,561,962.12
  5. Step 5: Solve for x
    x = 3,960,561,962.12/91,907.97
  6. Step 6: Final answer
    x = 43,092.70

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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.