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Finding the Fourth Proportional to 155.66, 214.74 and 109.10

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Solution

The fourth proportional to 155.66, 214.74 and 109.10 is: 150.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.66 : 214.74 = 109.10 : x
  2. Step 2: Convert to fraction form
    155.66/214.74 = 109.10/x
  3. Step 3: Cross multiply
    155.66x = 214.74 × 109.10
  4. Step 4: Simplify right side
    155.66x = 23,427.06
  5. Step 5: Solve for x
    x = 23,427.06/155.66
  6. Step 6: Final answer
    x = 150.51

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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.