Home / 51,422.40-77,120.64-20,257.92

Finding the Fourth Proportional to 51,422.40, 77,120.64 and 20,257.92

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Solution

The fourth proportional to 51,422.40, 77,120.64 and 20,257.92 is: 30,381.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,422.40 : 77,120.64 = 20,257.92 : x
  2. Step 2: Convert to fraction form
    51,422.40/77,120.64 = 20,257.92/x
  3. Step 3: Cross multiply
    51,422.40x = 77,120.64 × 20,257.92
  4. Step 4: Simplify right side
    51,422.40x = 1,562,303,755.47
  5. Step 5: Solve for x
    x = 1,562,303,755.47/51,422.40
  6. Step 6: Final answer
    x = 30,381.77

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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.