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Finding the Fourth Proportional to 71.43, 106.50 and 71.34

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Solution

The fourth proportional to 71.43, 106.50 and 71.34 is: 106.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    71.43 : 106.50 = 71.34 : x
  2. Step 2: Convert to fraction form
    71.43/106.50 = 71.34/x
  3. Step 3: Cross multiply
    71.43x = 106.50 × 71.34
  4. Step 4: Simplify right side
    71.43x = 7,597.71
  5. Step 5: Solve for x
    x = 7,597.71/71.43
  6. Step 6: Final answer
    x = 106.37

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These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.