Home / 75,620.29-113,421.80-20,220.61

Finding the Fourth Proportional to 75,620.29, 113,421.80 and 20,220.61

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Solution

The fourth proportional to 75,620.29, 113,421.80 and 20,220.61 is: 30,328.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,620.29 : 113,421.80 = 20,220.61 : x
  2. Step 2: Convert to fraction form
    75,620.29/113,421.80 = 20,220.61/x
  3. Step 3: Cross multiply
    75,620.29x = 113,421.80 × 20,220.61
  4. Step 4: Simplify right side
    75,620.29x = 2,293,457,882.19
  5. Step 5: Solve for x
    x = 2,293,457,882.19/75,620.29
  6. Step 6: Final answer
    x = 30,328.60

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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.