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Finding the Fourth Proportional to 88.35, 121.92 and 49.53

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Solution

The fourth proportional to 88.35, 121.92 and 49.53 is: 68.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.35 : 121.92 = 49.53 : x
  2. Step 2: Convert to fraction form
    88.35/121.92 = 49.53/x
  3. Step 3: Cross multiply
    88.35x = 121.92 × 49.53
  4. Step 4: Simplify right side
    88.35x = 6,038.70
  5. Step 5: Solve for x
    x = 6,038.70/88.35
  6. Step 6: Final answer
    x = 68.35

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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.