Home / 72,987.24-100,749.78-47,838.36

Finding the Fourth Proportional to 72,987.24, 100,749.78 and 47,838.36

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Solution

The fourth proportional to 72,987.24, 100,749.78 and 47,838.36 is: 66,034.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,987.24 : 100,749.78 = 47,838.36 : x
  2. Step 2: Convert to fraction form
    72,987.24/100,749.78 = 47,838.36/x
  3. Step 3: Cross multiply
    72,987.24x = 100,749.78 × 47,838.36
  4. Step 4: Simplify right side
    72,987.24x = 4,819,704,245.56
  5. Step 5: Solve for x
    x = 4,819,704,245.56/72,987.24
  6. Step 6: Final answer
    x = 66,034.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.