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Finding the Fourth Proportional to 91,091.04, 136,643.04 and 28,761

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Solution

The fourth proportional to 91,091.04, 136,643.04 and 28,761 is: 43,143.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,091.04 : 136,643.04 = 28,761 : x
  2. Step 2: Convert to fraction form
    91,091.04/136,643.04 = 28,761/x
  3. Step 3: Cross multiply
    91,091.04x = 136,643.04 × 28,761
  4. Step 4: Simplify right side
    91,091.04x = 3,929,990,473.44
  5. Step 5: Solve for x
    x = 3,929,990,473.44/91,091.04
  6. Step 6: Final answer
    x = 43,143.55

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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.