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Finding the Fourth Proportional to 68,170.50, 94,075.29 and 39,881.70

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Solution

The fourth proportional to 68,170.50, 94,075.29 and 39,881.70 is: 55,036.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,170.50 : 94,075.29 = 39,881.70 : x
  2. Step 2: Convert to fraction form
    68,170.50/94,075.29 = 39,881.70/x
  3. Step 3: Cross multiply
    68,170.50x = 94,075.29 × 39,881.70
  4. Step 4: Simplify right side
    68,170.50x = 3,751,882,493.19
  5. Step 5: Solve for x
    x = 3,751,882,493.19/68,170.50
  6. Step 6: Final answer
    x = 55,036.75

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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.