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Finding the Fourth Proportional to 211,626.84, 291,999.42 and 122,151

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Solution

The fourth proportional to 211,626.84, 291,999.42 and 122,151 is: 168,542.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,626.84 : 291,999.42 = 122,151 : x
  2. Step 2: Convert to fraction form
    211,626.84/291,999.42 = 122,151/x
  3. Step 3: Cross multiply
    211,626.84x = 291,999.42 × 122,151
  4. Step 4: Simplify right side
    211,626.84x = 35,668,021,152.42
  5. Step 5: Solve for x
    x = 35,668,021,152.42/211,626.84
  6. Step 6: Final answer
    x = 168,542.05

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.