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Finding the Fourth Proportional to 78,609.96, 117,890.64 and 26,008.56

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Solution

The fourth proportional to 78,609.96, 117,890.64 and 26,008.56 is: 39,004.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,609.96 : 117,890.64 = 26,008.56 : x
  2. Step 2: Convert to fraction form
    78,609.96/117,890.64 = 26,008.56/x
  3. Step 3: Cross multiply
    78,609.96x = 117,890.64 × 26,008.56
  4. Step 4: Simplify right side
    78,609.96x = 3,066,165,783.88
  5. Step 5: Solve for x
    x = 3,066,165,783.88/78,609.96
  6. Step 6: Final answer
    x = 39,004.80

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1.5x scale

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.