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Finding the Fourth Proportional to 72,961.62, 109,448.07 and 28,004.59

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Solution

The fourth proportional to 72,961.62, 109,448.07 and 28,004.59 is: 42,009.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,961.62 : 109,448.07 = 28,004.59 : x
  2. Step 2: Convert to fraction form
    72,961.62/109,448.07 = 28,004.59/x
  3. Step 3: Cross multiply
    72,961.62x = 109,448.07 × 28,004.59
  4. Step 4: Simplify right side
    72,961.62x = 3,065,048,632.30
  5. Step 5: Solve for x
    x = 3,065,048,632.30/72,961.62
  6. Step 6: Final answer
    x = 42,009.05

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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.