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Finding the Fourth Proportional to 223,911.14, 308,999.34 and 121,937.04

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Solution

The fourth proportional to 223,911.14, 308,999.34 and 121,937.04 is: 168,274.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,911.14 : 308,999.34 = 121,937.04 : x
  2. Step 2: Convert to fraction form
    223,911.14/308,999.34 = 121,937.04/x
  3. Step 3: Cross multiply
    223,911.14x = 308,999.34 × 121,937.04
  4. Step 4: Simplify right side
    223,911.14x = 37,678,464,881.55
  5. Step 5: Solve for x
    x = 37,678,464,881.55/223,911.14
  6. Step 6: Final answer
    x = 168,274.19

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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.