Home / 51,419.80-77,148.90-20,276.76

Finding the Fourth Proportional to 51,419.80, 77,148.90 and 20,276.76

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Solution

The fourth proportional to 51,419.80, 77,148.90 and 20,276.76 is: 30,422.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,419.80 : 77,148.90 = 20,276.76 : x
  2. Step 2: Convert to fraction form
    51,419.80/77,148.90 = 20,276.76/x
  3. Step 3: Cross multiply
    51,419.80x = 77,148.90 × 20,276.76
  4. Step 4: Simplify right side
    51,419.80x = 1,564,329,729.56
  5. Step 5: Solve for x
    x = 1,564,329,729.56/51,419.80
  6. Step 6: Final answer
    x = 30,422.71

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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.