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Finding the Fourth Proportional to 108,357.60, 149,625.76 and 68,138.64

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Solution

The fourth proportional to 108,357.60, 149,625.76 and 68,138.64 is: 94,089.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,357.60 : 149,625.76 = 68,138.64 : x
  2. Step 2: Convert to fraction form
    108,357.60/149,625.76 = 68,138.64/x
  3. Step 3: Cross multiply
    108,357.60x = 149,625.76 × 68,138.64
  4. Step 4: Simplify right side
    108,357.60x = 10,195,295,795.37
  5. Step 5: Solve for x
    x = 10,195,295,795.37/108,357.60
  6. Step 6: Final answer
    x = 94,089.35

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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.