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Finding the Fourth Proportional to 223,212.86, 308,036 and 121,239.30

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Solution

The fourth proportional to 223,212.86, 308,036 and 121,239.30 is: 167,311.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,212.86 : 308,036 = 121,239.30 : x
  2. Step 2: Convert to fraction form
    223,212.86/308,036 = 121,239.30/x
  3. Step 3: Cross multiply
    223,212.86x = 308,036 × 121,239.30
  4. Step 4: Simplify right side
    223,212.86x = 37,346,069,014.80
  5. Step 5: Solve for x
    x = 37,346,069,014.80/223,212.86
  6. Step 6: Final answer
    x = 167,311.46

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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.