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Finding the Fourth Proportional to 108,434.64, 149,621.96 and 68,119.86

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Solution

The fourth proportional to 108,434.64, 149,621.96 and 68,119.86 is: 93,994.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,434.64 : 149,621.96 = 68,119.86 : x
  2. Step 2: Convert to fraction form
    108,434.64/149,621.96 = 68,119.86/x
  3. Step 3: Cross multiply
    108,434.64x = 149,621.96 × 68,119.86
  4. Step 4: Simplify right side
    108,434.64x = 10,192,225,879.42
  5. Step 5: Solve for x
    x = 10,192,225,879.42/108,434.64
  6. Step 6: Final answer
    x = 93,994.19

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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.