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Finding the Fourth Proportional to 223,145.70, 307,940.72 and 122,543.70

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Solution

The fourth proportional to 223,145.70, 307,940.72 and 122,543.70 is: 169,110.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,145.70 : 307,940.72 = 122,543.70 : x
  2. Step 2: Convert to fraction form
    223,145.70/307,940.72 = 122,543.70/x
  3. Step 3: Cross multiply
    223,145.70x = 307,940.72 × 122,543.70
  4. Step 4: Simplify right side
    223,145.70x = 37,736,194,596.75
  5. Step 5: Solve for x
    x = 37,736,194,596.75/223,145.70
  6. Step 6: Final answer
    x = 169,110.11

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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.