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Finding the Fourth Proportional to 74,021.60, 110,708.40 and 66,180.80

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Solution

The fourth proportional to 74,021.60, 110,708.40 and 66,180.80 is: 98,981.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,021.60 : 110,708.40 = 66,180.80 : x
  2. Step 2: Convert to fraction form
    74,021.60/110,708.40 = 66,180.80/x
  3. Step 3: Cross multiply
    74,021.60x = 110,708.40 × 66,180.80
  4. Step 4: Simplify right side
    74,021.60x = 7,326,770,478.72
  5. Step 5: Solve for x
    x = 7,326,770,478.72/74,021.60
  6. Step 6: Final answer
    x = 98,981.52

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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.