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Finding the Fourth Proportional to 72,090.76, 107,991.14 and 35,958.28

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Solution

The fourth proportional to 72,090.76, 107,991.14 and 35,958.28 is: 53,865.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,090.76 : 107,991.14 = 35,958.28 : x
  2. Step 2: Convert to fraction form
    72,090.76/107,991.14 = 35,958.28/x
  3. Step 3: Cross multiply
    72,090.76x = 107,991.14 × 35,958.28
  4. Step 4: Simplify right side
    72,090.76x = 3,883,175,649.64
  5. Step 5: Solve for x
    x = 3,883,175,649.64/72,090.76
  6. Step 6: Final answer
    x = 53,865.10

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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.