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Finding the Fourth Proportional to 78,700.85, 118,040.48 and 26,104.85

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Solution

The fourth proportional to 78,700.85, 118,040.48 and 26,104.85 is: 39,153.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,700.85 : 118,040.48 = 26,104.85 : x
  2. Step 2: Convert to fraction form
    78,700.85/118,040.48 = 26,104.85/x
  3. Step 3: Cross multiply
    78,700.85x = 118,040.48 × 26,104.85
  4. Step 4: Simplify right side
    78,700.85x = 3,081,428,893.80
  5. Step 5: Solve for x
    x = 3,081,428,893.80/78,700.85
  6. Step 6: Final answer
    x = 39,153.69

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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.