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Finding the Fourth Proportional to 72,958.57, 100,720.89 and 51,788.41

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Solution

The fourth proportional to 72,958.57, 100,720.89 and 51,788.41 is: 71,495.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,958.57 : 100,720.89 = 51,788.41 : x
  2. Step 2: Convert to fraction form
    72,958.57/100,720.89 = 51,788.41/x
  3. Step 3: Cross multiply
    72,958.57x = 100,720.89 × 51,788.41
  4. Step 4: Simplify right side
    72,958.57x = 5,216,174,495.08
  5. Step 5: Solve for x
    x = 5,216,174,495.08/72,958.57
  6. Step 6: Final answer
    x = 71,495.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.