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Finding the Fourth Proportional to 108,435.60, 149,682.60 and 65,991.60

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Solution

The fourth proportional to 108,435.60, 149,682.60 and 65,991.60 is: 91,093.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,435.60 : 149,682.60 = 65,991.60 : x
  2. Step 2: Convert to fraction form
    108,435.60/149,682.60 = 65,991.60/x
  3. Step 3: Cross multiply
    108,435.60x = 149,682.60 × 65,991.60
  4. Step 4: Simplify right side
    108,435.60x = 9,877,794,266.16
  5. Step 5: Solve for x
    x = 9,877,794,266.16/108,435.60
  6. Step 6: Final answer
    x = 91,093.65

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1.5x scale

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.