Home / 86,289.12-129,450-33,695.28

Finding the Fourth Proportional to 86,289.12, 129,450 and 33,695.28

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Solution

The fourth proportional to 86,289.12, 129,450 and 33,695.28 is: 50,549.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,289.12 : 129,450 = 33,695.28 : x
  2. Step 2: Convert to fraction form
    86,289.12/129,450 = 33,695.28/x
  3. Step 3: Cross multiply
    86,289.12x = 129,450 × 33,695.28
  4. Step 4: Simplify right side
    86,289.12x = 4,361,853,996
  5. Step 5: Solve for x
    x = 4,361,853,996/86,289.12
  6. Step 6: Final answer
    x = 50,549.29

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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.