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Finding the Fourth Proportional to 108,689.72, 149,928.17 and 68,339.57

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Solution

The fourth proportional to 108,689.72, 149,928.17 and 68,339.57 is: 94,268.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,689.72 : 149,928.17 = 68,339.57 : x
  2. Step 2: Convert to fraction form
    108,689.72/149,928.17 = 68,339.57/x
  3. Step 3: Cross multiply
    108,689.72x = 149,928.17 × 68,339.57
  4. Step 4: Simplify right side
    108,689.72x = 10,246,025,577.35
  5. Step 5: Solve for x
    x = 10,246,025,577.35/108,689.72
  6. Step 6: Final answer
    x = 94,268.58

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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.