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Finding the Fourth Proportional to 108,425.87, 149,719.54 and 68,152.60

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Solution

The fourth proportional to 108,425.87, 149,719.54 and 68,152.60 is: 94,108.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,425.87 : 149,719.54 = 68,152.60 : x
  2. Step 2: Convert to fraction form
    108,425.87/149,719.54 = 68,152.60/x
  3. Step 3: Cross multiply
    108,425.87x = 149,719.54 × 68,152.60
  4. Step 4: Simplify right side
    108,425.87x = 10,203,775,803.08
  5. Step 5: Solve for x
    x = 10,203,775,803.08/108,425.87
  6. Step 6: Final answer
    x = 94,108.32

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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.