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Finding the Fourth Proportional to 120,630.96, 166,119.84 and 112,929.24

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Solution

The fourth proportional to 120,630.96, 166,119.84 and 112,929.24 is: 155,513.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,630.96 : 166,119.84 = 112,929.24 : x
  2. Step 2: Convert to fraction form
    120,630.96/166,119.84 = 112,929.24/x
  3. Step 3: Cross multiply
    120,630.96x = 166,119.84 × 112,929.24
  4. Step 4: Simplify right side
    120,630.96x = 18,759,787,280.12
  5. Step 5: Solve for x
    x = 18,759,787,280.12/120,630.96
  6. Step 6: Final answer
    x = 155,513.87

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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.