Home / 81,670.50-112,355.37-78,171.30

Finding the Fourth Proportional to 81,670.50, 112,355.37 and 78,171.30

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Solution

The fourth proportional to 81,670.50, 112,355.37 and 78,171.30 is: 107,541.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,670.50 : 112,355.37 = 78,171.30 : x
  2. Step 2: Convert to fraction form
    81,670.50/112,355.37 = 78,171.30/x
  3. Step 3: Cross multiply
    81,670.50x = 112,355.37 × 78,171.30
  4. Step 4: Simplify right side
    81,670.50x = 8,782,965,334.88
  5. Step 5: Solve for x
    x = 8,782,965,334.88/81,670.50
  6. Step 6: Final answer
    x = 107,541.47

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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.