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Finding the Fourth Proportional to 66,221.25, 91,385.34 and 36,413.25

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Solution

The fourth proportional to 66,221.25, 91,385.34 and 36,413.25 is: 50,250.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,221.25 : 91,385.34 = 36,413.25 : x
  2. Step 2: Convert to fraction form
    66,221.25/91,385.34 = 36,413.25/x
  3. Step 3: Cross multiply
    66,221.25x = 91,385.34 × 36,413.25
  4. Step 4: Simplify right side
    66,221.25x = 3,327,637,231.76
  5. Step 5: Solve for x
    x = 3,327,637,231.76/66,221.25
  6. Step 6: Final answer
    x = 50,250.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.