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Finding the Fourth Proportional to 155.37, 214.30 and 100.07

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Solution

The fourth proportional to 155.37, 214.30 and 100.07 is: 138.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.37 : 214.30 = 100.07 : x
  2. Step 2: Convert to fraction form
    155.37/214.30 = 100.07/x
  3. Step 3: Cross multiply
    155.37x = 214.30 × 100.07
  4. Step 4: Simplify right side
    155.37x = 21,445.00
  5. Step 5: Solve for x
    x = 21,445.00/155.37
  6. Step 6: Final answer
    x = 138.03

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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.