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Finding the Fourth Proportional to 66,021.87, 91,109.92 and 35,807.07

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Solution

The fourth proportional to 66,021.87, 91,109.92 and 35,807.07 is: 49,413.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,021.87 : 91,109.92 = 35,807.07 : x
  2. Step 2: Convert to fraction form
    66,021.87/91,109.92 = 35,807.07/x
  3. Step 3: Cross multiply
    66,021.87x = 91,109.92 × 35,807.07
  4. Step 4: Simplify right side
    66,021.87x = 3,262,379,283.13
  5. Step 5: Solve for x
    x = 3,262,379,283.13/66,021.87
  6. Step 6: Final answer
    x = 49,413.62

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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.