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Finding the Fourth Proportional to 7,187,536.89, 9,918,667.89 and 4,089,991.59

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Solution

The fourth proportional to 7,187,536.89, 9,918,667.89 and 4,089,991.59 is: 5,644,112.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,187,536.89 : 9,918,667.89 = 4,089,991.59 : x
  2. Step 2: Convert to fraction form
    7,187,536.89/9,918,667.89 = 4,089,991.59/x
  3. Step 3: Cross multiply
    7,187,536.89x = 9,918,667.89 × 4,089,991.59
  4. Step 4: Simplify right side
    7,187,536.89x = 40,567,268,254,103.05
  5. Step 5: Solve for x
    x = 40,567,268,254,103.05/7,187,536.89
  6. Step 6: Final answer
    x = 5,644,112.70

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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.