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Finding the Fourth Proportional to 72,911.52, 109,376.38 and 28,532.52

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Solution

The fourth proportional to 72,911.52, 109,376.38 and 28,532.52 is: 42,802.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,911.52 : 109,376.38 = 28,532.52 : x
  2. Step 2: Convert to fraction form
    72,911.52/109,376.38 = 28,532.52/x
  3. Step 3: Cross multiply
    72,911.52x = 109,376.38 × 28,532.52
  4. Step 4: Simplify right side
    72,911.52x = 3,120,783,749.88
  5. Step 5: Solve for x
    x = 3,120,783,749.88/72,911.52
  6. Step 6: Final answer
    x = 42,802.34

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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.