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Finding the Fourth Proportional to 72,467.28, 108,688.41 and 19,159.74

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Solution

The fourth proportional to 72,467.28, 108,688.41 and 19,159.74 is: 28,736.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,467.28 : 108,688.41 = 19,159.74 : x
  2. Step 2: Convert to fraction form
    72,467.28/108,688.41 = 19,159.74/x
  3. Step 3: Cross multiply
    72,467.28x = 108,688.41 × 19,159.74
  4. Step 4: Simplify right side
    72,467.28x = 2,082,441,676.61
  5. Step 5: Solve for x
    x = 2,082,441,676.61/72,467.28
  6. Step 6: Final answer
    x = 28,736.30

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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.