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Finding the Fourth Proportional to 45,351, 68,031.60 and 12,072.36

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Solution

The fourth proportional to 45,351, 68,031.60 and 12,072.36 is: 18,109.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,351 : 68,031.60 = 12,072.36 : x
  2. Step 2: Convert to fraction form
    45,351/68,031.60 = 12,072.36/x
  3. Step 3: Cross multiply
    45,351x = 68,031.60 × 12,072.36
  4. Step 4: Simplify right side
    45,351x = 821,301,966.58
  5. Step 5: Solve for x
    x = 821,301,966.58/45,351
  6. Step 6: Final answer
    x = 18,109.90

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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.