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Finding the Fourth Proportional to 91,292.25, 136,960.25 and 28,962.75

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Solution

The fourth proportional to 91,292.25, 136,960.25 and 28,962.75 is: 43,451.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,292.25 : 136,960.25 = 28,962.75 : x
  2. Step 2: Convert to fraction form
    91,292.25/136,960.25 = 28,962.75/x
  3. Step 3: Cross multiply
    91,292.25x = 136,960.25 × 28,962.75
  4. Step 4: Simplify right side
    91,292.25x = 3,966,745,335.87
  5. Step 5: Solve for x
    x = 3,966,745,335.87/91,292.25
  6. Step 6: Final answer
    x = 43,451.06

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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.