Home / 86,578.30-129,903.90-47,163.70

Finding the Fourth Proportional to 86,578.30, 129,903.90 and 47,163.70

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Solution

The fourth proportional to 86,578.30, 129,903.90 and 47,163.70 is: 70,765.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,578.30 : 129,903.90 = 47,163.70 : x
  2. Step 2: Convert to fraction form
    86,578.30/129,903.90 = 47,163.70/x
  3. Step 3: Cross multiply
    86,578.30x = 129,903.90 × 47,163.70
  4. Step 4: Simplify right side
    86,578.30x = 6,126,748,568.43
  5. Step 5: Solve for x
    x = 6,126,748,568.43/86,578.30
  6. Step 6: Final answer
    x = 70,765.41

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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.