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Finding the Fourth Proportional to 107,643.20, 161,119.20 and 84,142.40

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Solution

The fourth proportional to 107,643.20, 161,119.20 and 84,142.40 is: 125,943.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,643.20 : 161,119.20 = 84,142.40 : x
  2. Step 2: Convert to fraction form
    107,643.20/161,119.20 = 84,142.40/x
  3. Step 3: Cross multiply
    107,643.20x = 161,119.20 × 84,142.40
  4. Step 4: Simplify right side
    107,643.20x = 13,556,956,174.08
  5. Step 5: Solve for x
    x = 13,556,956,174.08/107,643.20
  6. Step 6: Final answer
    x = 125,943.45

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