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Finding the Fourth Proportional to 45,340, 68,013.92 and 12,508

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Solution

The fourth proportional to 45,340, 68,013.92 and 12,508 is: 18,763.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,340 : 68,013.92 = 12,508 : x
  2. Step 2: Convert to fraction form
    45,340/68,013.92 = 12,508/x
  3. Step 3: Cross multiply
    45,340x = 68,013.92 × 12,508
  4. Step 4: Simplify right side
    45,340x = 850,718,111.36
  5. Step 5: Solve for x
    x = 850,718,111.36/45,340
  6. Step 6: Final answer
    x = 18,763.08

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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.