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Finding the Fourth Proportional to 70,650.39, 105,992.00 and 20,728.47

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Solution

The fourth proportional to 70,650.39, 105,992.00 and 20,728.47 is: 31,097.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,650.39 : 105,992.00 = 20,728.47 : x
  2. Step 2: Convert to fraction form
    70,650.39/105,992.00 = 20,728.47/x
  3. Step 3: Cross multiply
    70,650.39x = 105,992.00 × 20,728.47
  4. Step 4: Simplify right side
    70,650.39x = 2,197,051,888.60
  5. Step 5: Solve for x
    x = 2,197,051,888.60/70,650.39
  6. Step 6: Final answer
    x = 31,097.52

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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.