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Finding the Fourth Proportional to 72,615.96, 108,910.98 and 19,308.24

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Solution

The fourth proportional to 72,615.96, 108,910.98 and 19,308.24 is: 28,958.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,615.96 : 108,910.98 = 19,308.24 : x
  2. Step 2: Convert to fraction form
    72,615.96/108,910.98 = 19,308.24/x
  3. Step 3: Cross multiply
    72,615.96x = 108,910.98 × 19,308.24
  4. Step 4: Simplify right side
    72,615.96x = 2,102,879,340.48
  5. Step 5: Solve for x
    x = 2,102,879,340.48/72,615.96
  6. Step 6: Final answer
    x = 28,958.91

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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.