Home / 81,728.62-112,788.38-45,917.90

Finding the Fourth Proportional to 81,728.62, 112,788.38 and 45,917.90

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Solution

The fourth proportional to 81,728.62, 112,788.38 and 45,917.90 is: 63,368.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,728.62 : 112,788.38 = 45,917.90 : x
  2. Step 2: Convert to fraction form
    81,728.62/112,788.38 = 45,917.90/x
  3. Step 3: Cross multiply
    81,728.62x = 112,788.38 × 45,917.90
  4. Step 4: Simplify right side
    81,728.62x = 5,179,005,554.00
  5. Step 5: Solve for x
    x = 5,179,005,554.00/81,728.62
  6. Step 6: Final answer
    x = 63,368.32

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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.