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Finding the Fourth Proportional to 65.07, 89.30 and 62.43

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Solution

The fourth proportional to 65.07, 89.30 and 62.43 is: 85.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    65.07 : 89.30 = 62.43 : x
  2. Step 2: Convert to fraction form
    65.07/89.30 = 62.43/x
  3. Step 3: Cross multiply
    65.07x = 89.30 × 62.43
  4. Step 4: Simplify right side
    65.07x = 5,575.00
  5. Step 5: Solve for x
    x = 5,575.00/65.07
  6. Step 6: Final answer
    x = 85.68

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These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.