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Finding the Fourth Proportional to 66,660.93, 91,991.10 and 39,798.39

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Solution

The fourth proportional to 66,660.93, 91,991.10 and 39,798.39 is: 54,921.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,660.93 : 91,991.10 = 39,798.39 : x
  2. Step 2: Convert to fraction form
    66,660.93/91,991.10 = 39,798.39/x
  3. Step 3: Cross multiply
    66,660.93x = 91,991.10 × 39,798.39
  4. Step 4: Simplify right side
    66,660.93x = 3,661,097,674.33
  5. Step 5: Solve for x
    x = 3,661,097,674.33/66,660.93
  6. Step 6: Final answer
    x = 54,921.19

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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.