Home / 67,086.15-100,643.80-20,342.67

Finding the Fourth Proportional to 67,086.15, 100,643.80 and 20,342.67

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Solution

The fourth proportional to 67,086.15, 100,643.80 and 20,342.67 is: 30,518.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,086.15 : 100,643.80 = 20,342.67 : x
  2. Step 2: Convert to fraction form
    67,086.15/100,643.80 = 20,342.67/x
  3. Step 3: Cross multiply
    67,086.15x = 100,643.80 × 20,342.67
  4. Step 4: Simplify right side
    67,086.15x = 2,047,363,610.95
  5. Step 5: Solve for x
    x = 2,047,363,610.95/67,086.15
  6. Step 6: Final answer
    x = 30,518.42

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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.