Home / 78,118.51-117,183.27-38,665.03

Finding the Fourth Proportional to 78,118.51, 117,183.27 and 38,665.03

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Solution

The fourth proportional to 78,118.51, 117,183.27 and 38,665.03 is: 58,000.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,118.51 : 117,183.27 = 38,665.03 : x
  2. Step 2: Convert to fraction form
    78,118.51/117,183.27 = 38,665.03/x
  3. Step 3: Cross multiply
    78,118.51x = 117,183.27 × 38,665.03
  4. Step 4: Simplify right side
    78,118.51x = 4,530,894,869.02
  5. Step 5: Solve for x
    x = 4,530,894,869.02/78,118.51
  6. Step 6: Final answer
    x = 58,000.27

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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.