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Finding the Fourth Proportional to 90,604.40, 135,841.80 and 40,643.60

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Solution

The fourth proportional to 90,604.40, 135,841.80 and 40,643.60 is: 60,936.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,604.40 : 135,841.80 = 40,643.60 : x
  2. Step 2: Convert to fraction form
    90,604.40/135,841.80 = 40,643.60/x
  3. Step 3: Cross multiply
    90,604.40x = 135,841.80 × 40,643.60
  4. Step 4: Simplify right side
    90,604.40x = 5,521,099,782.48
  5. Step 5: Solve for x
    x = 5,521,099,782.48/90,604.40
  6. Step 6: Final answer
    x = 60,936.33

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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.