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Finding the Fourth Proportional to 153.16, 210.89 and 126.83

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Solution

The fourth proportional to 153.16, 210.89 and 126.83 is: 174.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    153.16 : 210.89 = 126.83 : x
  2. Step 2: Convert to fraction form
    153.16/210.89 = 126.83/x
  3. Step 3: Cross multiply
    153.16x = 210.89 × 126.83
  4. Step 4: Simplify right side
    153.16x = 26,748.02
  5. Step 5: Solve for x
    x = 26,748.02/153.16
  6. Step 6: Final answer
    x = 174.64

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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.