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Finding the Fourth Proportional to 153.70, 211.57 and 116.77

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Solution

The fourth proportional to 153.70, 211.57 and 116.77 is: 160.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    153.70 : 211.57 = 116.77 : x
  2. Step 2: Convert to fraction form
    153.70/211.57 = 116.77/x
  3. Step 3: Cross multiply
    153.70x = 211.57 × 116.77
  4. Step 4: Simplify right side
    153.70x = 24,705.03
  5. Step 5: Solve for x
    x = 24,705.03/153.70
  6. Step 6: Final answer
    x = 160.74

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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.