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Finding the Fourth Proportional to 77,128.88, 114,850.56 and 74,291.33

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Solution

The fourth proportional to 77,128.88, 114,850.56 and 74,291.33 is: 110,625.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,128.88 : 114,850.56 = 74,291.33 : x
  2. Step 2: Convert to fraction form
    77,128.88/114,850.56 = 74,291.33/x
  3. Step 3: Cross multiply
    77,128.88x = 114,850.56 × 74,291.33
  4. Step 4: Simplify right side
    77,128.88x = 8,532,400,355.44
  5. Step 5: Solve for x
    x = 8,532,400,355.44/77,128.88
  6. Step 6: Final answer
    x = 110,625.23

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.