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Finding the Fourth Proportional to 78,996.91, 118,495.38 and 26,406.40

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Solution

The fourth proportional to 78,996.91, 118,495.38 and 26,406.40 is: 39,609.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,996.91 : 118,495.38 = 26,406.40 : x
  2. Step 2: Convert to fraction form
    78,996.91/118,495.38 = 26,406.40/x
  3. Step 3: Cross multiply
    78,996.91x = 118,495.38 × 26,406.40
  4. Step 4: Simplify right side
    78,996.91x = 3,129,036,402.43
  5. Step 5: Solve for x
    x = 3,129,036,402.43/78,996.91
  6. Step 6: Final answer
    x = 39,609.61

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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.