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Finding the Fourth Proportional to 51,040.40, 76,555.20 and 15,978.20

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Solution

The fourth proportional to 51,040.40, 76,555.20 and 15,978.20 is: 23,965.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,040.40 : 76,555.20 = 15,978.20 : x
  2. Step 2: Convert to fraction form
    51,040.40/76,555.20 = 15,978.20/x
  3. Step 3: Cross multiply
    51,040.40x = 76,555.20 × 15,978.20
  4. Step 4: Simplify right side
    51,040.40x = 1,223,214,296.64
  5. Step 5: Solve for x
    x = 1,223,214,296.64/51,040.40
  6. Step 6: Final answer
    x = 23,965.61

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1.5x scale

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.