Home / 78,486.12-108,310.59-42,676.20

Finding the Fourth Proportional to 78,486.12, 108,310.59 and 42,676.20

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Solution

The fourth proportional to 78,486.12, 108,310.59 and 42,676.20 is: 58,893.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,486.12 : 108,310.59 = 42,676.20 : x
  2. Step 2: Convert to fraction form
    78,486.12/108,310.59 = 42,676.20/x
  3. Step 3: Cross multiply
    78,486.12x = 108,310.59 × 42,676.20
  4. Step 4: Simplify right side
    78,486.12x = 4,622,284,400.96
  5. Step 5: Solve for x
    x = 4,622,284,400.96/78,486.12
  6. Step 6: Final answer
    x = 58,893.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.