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Finding the Fourth Proportional to 78,676.31, 118,033.15 and 26,085.80

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Solution

The fourth proportional to 78,676.31, 118,033.15 and 26,085.80 is: 39,134.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,676.31 : 118,033.15 = 26,085.80 : x
  2. Step 2: Convert to fraction form
    78,676.31/118,033.15 = 26,085.80/x
  3. Step 3: Cross multiply
    78,676.31x = 118,033.15 × 26,085.80
  4. Step 4: Simplify right side
    78,676.31x = 3,078,988,759.11
  5. Step 5: Solve for x
    x = 3,078,988,759.11/78,676.31
  6. Step 6: Final answer
    x = 39,134.89

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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.