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Finding the Fourth Proportional to 68,715.95, 103,075.74 and 21,968.82

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Solution

The fourth proportional to 68,715.95, 103,075.74 and 21,968.82 is: 32,953.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,715.95 : 103,075.74 = 21,968.82 : x
  2. Step 2: Convert to fraction form
    68,715.95/103,075.74 = 21,968.82/x
  3. Step 3: Cross multiply
    68,715.95x = 103,075.74 × 21,968.82
  4. Step 4: Simplify right side
    68,715.95x = 2,264,452,378.43
  5. Step 5: Solve for x
    x = 2,264,452,378.43/68,715.95
  6. Step 6: Final answer
    x = 32,953.81

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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.