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Finding the Fourth Proportional to 152.66, 210.75 and 111.17

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Solution

The fourth proportional to 152.66, 210.75 and 111.17 is: 153.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.66 : 210.75 = 111.17 : x
  2. Step 2: Convert to fraction form
    152.66/210.75 = 111.17/x
  3. Step 3: Cross multiply
    152.66x = 210.75 × 111.17
  4. Step 4: Simplify right side
    152.66x = 23,429.08
  5. Step 5: Solve for x
    x = 23,429.08/152.66
  6. Step 6: Final answer
    x = 153.47

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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.