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Finding the Fourth Proportional to 66,413.60, 91,609.82 and 40,560.02

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Solution

The fourth proportional to 66,413.60, 91,609.82 and 40,560.02 is: 55,947.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,413.60 : 91,609.82 = 40,560.02 : x
  2. Step 2: Convert to fraction form
    66,413.60/91,609.82 = 40,560.02/x
  3. Step 3: Cross multiply
    66,413.60x = 91,609.82 × 40,560.02
  4. Step 4: Simplify right side
    66,413.60x = 3,715,696,131.40
  5. Step 5: Solve for x
    x = 3,715,696,131.40/66,413.60
  6. Step 6: Final answer
    x = 55,947.82

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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.