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Finding the Fourth Proportional to 192.58, 288.99 and 70.90

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Solution

The fourth proportional to 192.58, 288.99 and 70.90 is: 106.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    192.58 : 288.99 = 70.90 : x
  2. Step 2: Convert to fraction form
    192.58/288.99 = 70.90/x
  3. Step 3: Cross multiply
    192.58x = 288.99 × 70.90
  4. Step 4: Simplify right side
    192.58x = 20,489.39
  5. Step 5: Solve for x
    x = 20,489.39/192.58
  6. Step 6: Final answer
    x = 106.39

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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.