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Finding the Fourth Proportional to 88.12, 121.58 and 59

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Solution

The fourth proportional to 88.12, 121.58 and 59 is: 81.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.12 : 121.58 = 59 : x
  2. Step 2: Convert to fraction form
    88.12/121.58 = 59/x
  3. Step 3: Cross multiply
    88.12x = 121.58 × 59
  4. Step 4: Simplify right side
    88.12x = 7,173.22
  5. Step 5: Solve for x
    x = 7,173.22/88.12
  6. Step 6: Final answer
    x = 81.40

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.