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Finding the Fourth Proportional to 120,960.40, 181,221.90 and 103,464.40

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Solution

The fourth proportional to 120,960.40, 181,221.90 and 103,464.40 is: 155,009.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,960.40 : 181,221.90 = 103,464.40 : x
  2. Step 2: Convert to fraction form
    120,960.40/181,221.90 = 103,464.40/x
  3. Step 3: Cross multiply
    120,960.40x = 181,221.90 × 103,464.40
  4. Step 4: Simplify right side
    120,960.40x = 18,750,015,150.36
  5. Step 5: Solve for x
    x = 18,750,015,150.36/120,960.40
  6. Step 6: Final answer
    x = 155,009.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.