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Finding the Fourth Proportional to 103.02, 154.40 and 48.18

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Solution

The fourth proportional to 103.02, 154.40 and 48.18 is: 72.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    103.02 : 154.40 = 48.18 : x
  2. Step 2: Convert to fraction form
    103.02/154.40 = 48.18/x
  3. Step 3: Cross multiply
    103.02x = 154.40 × 48.18
  4. Step 4: Simplify right side
    103.02x = 7,438.75
  5. Step 5: Solve for x
    x = 7,438.75/103.02
  6. Step 6: Final answer
    x = 72.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.