Home / 51,987.05-78,015.18-28,300.57

Finding the Fourth Proportional to 51,987.05, 78,015.18 and 28,300.57

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Solution

The fourth proportional to 51,987.05, 78,015.18 and 28,300.57 is: 42,469.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,987.05 : 78,015.18 = 28,300.57 : x
  2. Step 2: Convert to fraction form
    51,987.05/78,015.18 = 28,300.57/x
  3. Step 3: Cross multiply
    51,987.05x = 78,015.18 × 28,300.57
  4. Step 4: Simplify right side
    51,987.05x = 2,207,873,921.15
  5. Step 5: Solve for x
    x = 2,207,873,921.15/51,987.05
  6. Step 6: Final answer
    x = 42,469.69

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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.