Home / 86,584.82-129,884.65-30,420.09

Finding the Fourth Proportional to 86,584.82, 129,884.65 and 30,420.09

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Solution

The fourth proportional to 86,584.82, 129,884.65 and 30,420.09 is: 45,632.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,584.82 : 129,884.65 = 30,420.09 : x
  2. Step 2: Convert to fraction form
    86,584.82/129,884.65 = 30,420.09/x
  3. Step 3: Cross multiply
    86,584.82x = 129,884.65 × 30,420.09
  4. Step 4: Simplify right side
    86,584.82x = 3,951,102,666.57
  5. Step 5: Solve for x
    x = 3,951,102,666.57/86,584.82
  6. Step 6: Final answer
    x = 45,632.74

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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.