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Finding the Fourth Proportional to 72,615.35, 108,929.75 and 28,245.44

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Solution

The fourth proportional to 72,615.35, 108,929.75 and 28,245.44 is: 42,370.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,615.35 : 108,929.75 = 28,245.44 : x
  2. Step 2: Convert to fraction form
    72,615.35/108,929.75 = 28,245.44/x
  3. Step 3: Cross multiply
    72,615.35x = 108,929.75 × 28,245.44
  4. Step 4: Simplify right side
    72,615.35x = 3,076,768,717.84
  5. Step 5: Solve for x
    x = 3,076,768,717.84/72,615.35
  6. Step 6: Final answer
    x = 42,370.78

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1.5x scale

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.