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Finding the Fourth Proportional to 68,642.90, 94,782.31 and 55,170.98

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Solution

The fourth proportional to 68,642.90, 94,782.31 and 55,170.98 is: 76,180.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,642.90 : 94,782.31 = 55,170.98 : x
  2. Step 2: Convert to fraction form
    68,642.90/94,782.31 = 55,170.98/x
  3. Step 3: Cross multiply
    68,642.90x = 94,782.31 × 55,170.98
  4. Step 4: Simplify right side
    68,642.90x = 5,229,232,317.52
  5. Step 5: Solve for x
    x = 5,229,232,317.52/68,642.90
  6. Step 6: Final answer
    x = 76,180.24

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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.