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Finding the Fourth Proportional to 78,958.89, 118,456.92 and 25,650.69

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Solution

The fourth proportional to 78,958.89, 118,456.92 and 25,650.69 is: 38,482.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,958.89 : 118,456.92 = 25,650.69 : x
  2. Step 2: Convert to fraction form
    78,958.89/118,456.92 = 25,650.69/x
  3. Step 3: Cross multiply
    78,958.89x = 118,456.92 × 25,650.69
  4. Step 4: Simplify right side
    78,958.89x = 3,038,501,733.27
  5. Step 5: Solve for x
    x = 3,038,501,733.27/78,958.89
  6. Step 6: Final answer
    x = 38,482.07

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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.