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Finding the Fourth Proportional to 107,429.60, 161,080.40 and 65,906.40

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Solution

The fourth proportional to 107,429.60, 161,080.40 and 65,906.40 is: 98,820.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,429.60 : 161,080.40 = 65,906.40 : x
  2. Step 2: Convert to fraction form
    107,429.60/161,080.40 = 65,906.40/x
  3. Step 3: Cross multiply
    107,429.60x = 161,080.40 × 65,906.40
  4. Step 4: Simplify right side
    107,429.60x = 10,616,229,274.56
  5. Step 5: Solve for x
    x = 10,616,229,274.56/107,429.60
  6. Step 6: Final answer
    x = 98,820.34

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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.