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Finding the Fourth Proportional to 45,992.95, 68,989.25 and 12,712.95

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Solution

The fourth proportional to 45,992.95, 68,989.25 and 12,712.95 is: 19,069.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,992.95 : 68,989.25 = 12,712.95 : x
  2. Step 2: Convert to fraction form
    45,992.95/68,989.25 = 12,712.95/x
  3. Step 3: Cross multiply
    45,992.95x = 68,989.25 × 12,712.95
  4. Step 4: Simplify right side
    45,992.95x = 877,056,917.57
  5. Step 5: Solve for x
    x = 877,056,917.57/45,992.95
  6. Step 6: Final answer
    x = 19,069.38

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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.