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Finding the Fourth Proportional to 378,072.80, 567,109.20 and 111,812.60

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Solution

The fourth proportional to 378,072.80, 567,109.20 and 111,812.60 is: 167,718.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,072.80 : 567,109.20 = 111,812.60 : x
  2. Step 2: Convert to fraction form
    378,072.80/567,109.20 = 111,812.60/x
  3. Step 3: Cross multiply
    378,072.80x = 567,109.20 × 111,812.60
  4. Step 4: Simplify right side
    378,072.80x = 63,409,951,300.37
  5. Step 5: Solve for x
    x = 63,409,951,300.37/378,072.80
  6. Step 6: Final answer
    x = 167,718.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.