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Finding the Fourth Proportional to 108,138.83, 149,148.64 and 65,073.42

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Solution

The fourth proportional to 108,138.83, 149,148.64 and 65,073.42 is: 89,751.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,138.83 : 149,148.64 = 65,073.42 : x
  2. Step 2: Convert to fraction form
    108,138.83/149,148.64 = 65,073.42/x
  3. Step 3: Cross multiply
    108,138.83x = 149,148.64 × 65,073.42
  4. Step 4: Simplify right side
    108,138.83x = 9,705,612,093.15
  5. Step 5: Solve for x
    x = 9,705,612,093.15/108,138.83
  6. Step 6: Final answer
    x = 89,751.41

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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.