Home / 81,713.60-112,777.89-76,377.32

Finding the Fourth Proportional to 81,713.60, 112,777.89 and 76,377.32

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Solution

The fourth proportional to 81,713.60, 112,777.89 and 76,377.32 is: 105,412.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,713.60 : 112,777.89 = 76,377.32 : x
  2. Step 2: Convert to fraction form
    81,713.60/112,777.89 = 76,377.32/x
  3. Step 3: Cross multiply
    81,713.60x = 112,777.89 × 76,377.32
  4. Step 4: Simplify right side
    81,713.60x = 8,613,672,993.45
  5. Step 5: Solve for x
    x = 8,613,672,993.45/81,713.60
  6. Step 6: Final answer
    x = 105,412.97

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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.