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Finding the Fourth Proportional to 72,467.60, 108,688.70 and 19,160.08

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Solution

The fourth proportional to 72,467.60, 108,688.70 and 19,160.08 is: 28,736.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,467.60 : 108,688.70 = 19,160.08 : x
  2. Step 2: Convert to fraction form
    72,467.60/108,688.70 = 19,160.08/x
  3. Step 3: Cross multiply
    72,467.60x = 108,688.70 × 19,160.08
  4. Step 4: Simplify right side
    72,467.60x = 2,082,483,963.27
  5. Step 5: Solve for x
    x = 2,082,483,963.27/72,467.60
  6. Step 6: Final answer
    x = 28,736.76

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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.