Home / 78,725.88-108,643.74-45,198.36

Finding the Fourth Proportional to 78,725.88, 108,643.74 and 45,198.36

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Solution

The fourth proportional to 78,725.88, 108,643.74 and 45,198.36 is: 62,374.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,725.88 : 108,643.74 = 45,198.36 : x
  2. Step 2: Convert to fraction form
    78,725.88/108,643.74 = 45,198.36/x
  3. Step 3: Cross multiply
    78,725.88x = 108,643.74 × 45,198.36
  4. Step 4: Simplify right side
    78,725.88x = 4,910,518,872.27
  5. Step 5: Solve for x
    x = 4,910,518,872.27/78,725.88
  6. Step 6: Final answer
    x = 62,374.90

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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.