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Finding the Fourth Proportional to 153.39, 210.94 and 136.99

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Solution

The fourth proportional to 153.39, 210.94 and 136.99 is: 188.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    153.39 : 210.94 = 136.99 : x
  2. Step 2: Convert to fraction form
    153.39/210.94 = 136.99/x
  3. Step 3: Cross multiply
    153.39x = 210.94 × 136.99
  4. Step 4: Simplify right side
    153.39x = 28,896.67
  5. Step 5: Solve for x
    x = 28,896.67/153.39
  6. Step 6: Final answer
    x = 188.39

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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.