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Finding the Fourth Proportional to 45,580, 68,349.86 and 20,619.04

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Solution

The fourth proportional to 45,580, 68,349.86 and 20,619.04 is: 30,919.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,580 : 68,349.86 = 20,619.04 : x
  2. Step 2: Convert to fraction form
    45,580/68,349.86 = 20,619.04/x
  3. Step 3: Cross multiply
    45,580x = 68,349.86 × 20,619.04
  4. Step 4: Simplify right side
    45,580x = 1,409,308,497.33
  5. Step 5: Solve for x
    x = 1,409,308,497.33/45,580
  6. Step 6: Final answer
    x = 30,919.45

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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.