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Finding the Fourth Proportional to 45,358.70, 68,036.79 and 12,079.05

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Solution

The fourth proportional to 45,358.70, 68,036.79 and 12,079.05 is: 18,118.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,358.70 : 68,036.79 = 12,079.05 : x
  2. Step 2: Convert to fraction form
    45,358.70/68,036.79 = 12,079.05/x
  3. Step 3: Cross multiply
    45,358.70x = 68,036.79 × 12,079.05
  4. Step 4: Simplify right side
    45,358.70x = 821,819,788.25
  5. Step 5: Solve for x
    x = 821,819,788.25/45,358.70
  6. Step 6: Final answer
    x = 18,118.24

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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.