Home / 86,091.80-128,759.96-76,670.55

Finding the Fourth Proportional to 86,091.80, 128,759.96 and 76,670.55

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Solution

The fourth proportional to 86,091.80, 128,759.96 and 76,670.55 is: 114,669.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,091.80 : 128,759.96 = 76,670.55 : x
  2. Step 2: Convert to fraction form
    86,091.80/128,759.96 = 76,670.55/x
  3. Step 3: Cross multiply
    86,091.80x = 128,759.96 × 76,670.55
  4. Step 4: Simplify right side
    86,091.80x = 9,872,097,142.85
  5. Step 5: Solve for x
    x = 9,872,097,142.85/86,091.80
  6. Step 6: Final answer
    x = 114,669.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.