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Finding the Fourth Proportional to 66,668.54, 91,995.62 and 39,807.45

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Solution

The fourth proportional to 66,668.54, 91,995.62 and 39,807.45 is: 54,930.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,668.54 : 91,995.62 = 39,807.45 : x
  2. Step 2: Convert to fraction form
    66,668.54/91,995.62 = 39,807.45/x
  3. Step 3: Cross multiply
    66,668.54x = 91,995.62 × 39,807.45
  4. Step 4: Simplify right side
    66,668.54x = 3,662,110,844.33
  5. Step 5: Solve for x
    x = 3,662,110,844.33/66,668.54
  6. Step 6: Final answer
    x = 54,930.12

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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.