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Finding the Fourth Proportional to 68,697.28, 94,640.40 and 64,563.84

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Solution

The fourth proportional to 68,697.28, 94,640.40 and 64,563.84 is: 88,945.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,697.28 : 94,640.40 = 64,563.84 : x
  2. Step 2: Convert to fraction form
    68,697.28/94,640.40 = 64,563.84/x
  3. Step 3: Cross multiply
    68,697.28x = 94,640.40 × 64,563.84
  4. Step 4: Simplify right side
    68,697.28x = 6,110,347,643.14
  5. Step 5: Solve for x
    x = 6,110,347,643.14/68,697.28
  6. Step 6: Final answer
    x = 88,945.99

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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.