Home / 76,830.05-105,784.21-65,322.33

Finding the Fourth Proportional to 76,830.05, 105,784.21 and 65,322.33

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Solution

The fourth proportional to 76,830.05, 105,784.21 and 65,322.33 is: 89,939.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,830.05 : 105,784.21 = 65,322.33 : x
  2. Step 2: Convert to fraction form
    76,830.05/105,784.21 = 65,322.33/x
  3. Step 3: Cross multiply
    76,830.05x = 105,784.21 × 65,322.33
  4. Step 4: Simplify right side
    76,830.05x = 6,910,071,074.41
  5. Step 5: Solve for x
    x = 6,910,071,074.41/76,830.05
  6. Step 6: Final answer
    x = 89,939.69

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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.