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Finding the Fourth Proportional to 48,668.57, 72,971.47 and 19,089.40

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Solution

The fourth proportional to 48,668.57, 72,971.47 and 19,089.40 is: 28,621.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,668.57 : 72,971.47 = 19,089.40 : x
  2. Step 2: Convert to fraction form
    48,668.57/72,971.47 = 19,089.40/x
  3. Step 3: Cross multiply
    48,668.57x = 72,971.47 × 19,089.40
  4. Step 4: Simplify right side
    48,668.57x = 1,392,981,166.84
  5. Step 5: Solve for x
    x = 1,392,981,166.84/48,668.57
  6. Step 6: Final answer
    x = 28,621.78

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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.