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Finding the Fourth Proportional to 66,383.20, 99,286.80 and 59,413.60

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Solution

The fourth proportional to 66,383.20, 99,286.80 and 59,413.60 is: 88,862.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,383.20 : 99,286.80 = 59,413.60 : x
  2. Step 2: Convert to fraction form
    66,383.20/99,286.80 = 59,413.60/x
  3. Step 3: Cross multiply
    66,383.20x = 99,286.80 × 59,413.60
  4. Step 4: Simplify right side
    66,383.20x = 5,898,986,220.48
  5. Step 5: Solve for x
    x = 5,898,986,220.48/66,383.20
  6. Step 6: Final answer
    x = 88,862.64

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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.