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Finding the Fourth Proportional to 154.58, 212.94 and 125.01

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Solution

The fourth proportional to 154.58, 212.94 and 125.01 is: 172.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.58 : 212.94 = 125.01 : x
  2. Step 2: Convert to fraction form
    154.58/212.94 = 125.01/x
  3. Step 3: Cross multiply
    154.58x = 212.94 × 125.01
  4. Step 4: Simplify right side
    154.58x = 26,619.63
  5. Step 5: Solve for x
    x = 26,619.63/154.58
  6. Step 6: Final answer
    x = 172.21

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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.