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Finding the Fourth Proportional to 145.37, 217.98 and 68.36

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Solution

The fourth proportional to 145.37, 217.98 and 68.36 is: 102.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.37 : 217.98 = 68.36 : x
  2. Step 2: Convert to fraction form
    145.37/217.98 = 68.36/x
  3. Step 3: Cross multiply
    145.37x = 217.98 × 68.36
  4. Step 4: Simplify right side
    145.37x = 14,900.02
  5. Step 5: Solve for x
    x = 14,900.02/145.37
  6. Step 6: Final answer
    x = 102.50

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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.