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Finding the Fourth Proportional to 90,137.36, 135,087.71 and 66,333.44

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Solution

The fourth proportional to 90,137.36, 135,087.71 and 66,333.44 is: 99,413.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,137.36 : 135,087.71 = 66,333.44 : x
  2. Step 2: Convert to fraction form
    90,137.36/135,087.71 = 66,333.44/x
  3. Step 3: Cross multiply
    90,137.36x = 135,087.71 × 66,333.44
  4. Step 4: Simplify right side
    90,137.36x = 8,960,831,498.92
  5. Step 5: Solve for x
    x = 8,960,831,498.92/90,137.36
  6. Step 6: Final answer
    x = 99,413.07

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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.