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Finding the Fourth Proportional to 68,399.87, 94,345.72 and 59,431.95

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Solution

The fourth proportional to 68,399.87, 94,345.72 and 59,431.95 is: 81,976.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,399.87 : 94,345.72 = 59,431.95 : x
  2. Step 2: Convert to fraction form
    68,399.87/94,345.72 = 59,431.95/x
  3. Step 3: Cross multiply
    68,399.87x = 94,345.72 × 59,431.95
  4. Step 4: Simplify right side
    68,399.87x = 5,607,149,965.17
  5. Step 5: Solve for x
    x = 5,607,149,965.17/68,399.87
  6. Step 6: Final answer
    x = 81,976.04

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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.