Home / 86,539.40-129,867.15-30,379.40

Finding the Fourth Proportional to 86,539.40, 129,867.15 and 30,379.40

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Solution

The fourth proportional to 86,539.40, 129,867.15 and 30,379.40 is: 45,589.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,539.40 : 129,867.15 = 30,379.40 : x
  2. Step 2: Convert to fraction form
    86,539.40/129,867.15 = 30,379.40/x
  3. Step 3: Cross multiply
    86,539.40x = 129,867.15 × 30,379.40
  4. Step 4: Simplify right side
    86,539.40x = 3,945,286,096.71
  5. Step 5: Solve for x
    x = 3,945,286,096.71/86,539.40
  6. Step 6: Final answer
    x = 45,589.48

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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.