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Finding the Fourth Proportional to 124.02, 172.35 and 122.49

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Solution

The fourth proportional to 124.02, 172.35 and 122.49 is: 170.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.02 : 172.35 = 122.49 : x
  2. Step 2: Convert to fraction form
    124.02/172.35 = 122.49/x
  3. Step 3: Cross multiply
    124.02x = 172.35 × 122.49
  4. Step 4: Simplify right side
    124.02x = 21,111.15
  5. Step 5: Solve for x
    x = 21,111.15/124.02
  6. Step 6: Final answer
    x = 170.22

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.