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Finding the Fourth Proportional to 88.59, 122.30 and 51.74

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Solution

The fourth proportional to 88.59, 122.30 and 51.74 is: 71.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.59 : 122.30 = 51.74 : x
  2. Step 2: Convert to fraction form
    88.59/122.30 = 51.74/x
  3. Step 3: Cross multiply
    88.59x = 122.30 × 51.74
  4. Step 4: Simplify right side
    88.59x = 6,326.93
  5. Step 5: Solve for x
    x = 6,326.93/88.59
  6. Step 6: Final answer
    x = 71.42

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Why These Related Problems?

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