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Finding the Fourth Proportional to 152.84, 210.55 and 111.27

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Solution

The fourth proportional to 152.84, 210.55 and 111.27 is: 153.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.84 : 210.55 = 111.27 : x
  2. Step 2: Convert to fraction form
    152.84/210.55 = 111.27/x
  3. Step 3: Cross multiply
    152.84x = 210.55 × 111.27
  4. Step 4: Simplify right side
    152.84x = 23,427.90
  5. Step 5: Solve for x
    x = 23,427.90/152.84
  6. Step 6: Final answer
    x = 153.28

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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.