Home / 77,147.27-115,615.80-47,172

Finding the Fourth Proportional to 77,147.27, 115,615.80 and 47,172

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Solution

The fourth proportional to 77,147.27, 115,615.80 and 47,172 is: 70,693.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,147.27 : 115,615.80 = 47,172 : x
  2. Step 2: Convert to fraction form
    77,147.27/115,615.80 = 47,172/x
  3. Step 3: Cross multiply
    77,147.27x = 115,615.80 × 47,172
  4. Step 4: Simplify right side
    77,147.27x = 5,453,828,517.60
  5. Step 5: Solve for x
    x = 5,453,828,517.60/77,147.27
  6. Step 6: Final answer
    x = 70,693.74

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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.