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Finding the Fourth Proportional to 51,379.68, 77,080.05 and 19,789.68

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Solution

The fourth proportional to 51,379.68, 77,080.05 and 19,789.68 is: 29,688.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,379.68 : 77,080.05 = 19,789.68 : x
  2. Step 2: Convert to fraction form
    51,379.68/77,080.05 = 19,789.68/x
  3. Step 3: Cross multiply
    51,379.68x = 77,080.05 × 19,789.68
  4. Step 4: Simplify right side
    51,379.68x = 1,525,389,523.88
  5. Step 5: Solve for x
    x = 1,525,389,523.88/51,379.68
  6. Step 6: Final answer
    x = 29,688.58

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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.