Home / 83,779.10-115,642.11-53,645.61

Finding the Fourth Proportional to 83,779.10, 115,642.11 and 53,645.61

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Solution

The fourth proportional to 83,779.10, 115,642.11 and 53,645.61 is: 74,048.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,779.10 : 115,642.11 = 53,645.61 : x
  2. Step 2: Convert to fraction form
    83,779.10/115,642.11 = 53,645.61/x
  3. Step 3: Cross multiply
    83,779.10x = 115,642.11 × 53,645.61
  4. Step 4: Simplify right side
    83,779.10x = 6,203,691,532.64
  5. Step 5: Solve for x
    x = 6,203,691,532.64/83,779.10
  6. Step 6: Final answer
    x = 74,048.20

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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.