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Finding the Fourth Proportional to 79,090.68, 109,141.64 and 43,282.20

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Solution

The fourth proportional to 79,090.68, 109,141.64 and 43,282.20 is: 59,727.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,090.68 : 109,141.64 = 43,282.20 : x
  2. Step 2: Convert to fraction form
    79,090.68/109,141.64 = 43,282.20/x
  3. Step 3: Cross multiply
    79,090.68x = 109,141.64 × 43,282.20
  4. Step 4: Simplify right side
    79,090.68x = 4,723,890,889.45
  5. Step 5: Solve for x
    x = 4,723,890,889.45/79,090.68
  6. Step 6: Final answer
    x = 59,727.53

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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.