Home / 77,071.25-115,609.23-20,911.13

Finding the Fourth Proportional to 77,071.25, 115,609.23 and 20,911.13

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Solution

The fourth proportional to 77,071.25, 115,609.23 and 20,911.13 is: 31,367.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,071.25 : 115,609.23 = 20,911.13 : x
  2. Step 2: Convert to fraction form
    77,071.25/115,609.23 = 20,911.13/x
  3. Step 3: Cross multiply
    77,071.25x = 115,609.23 × 20,911.13
  4. Step 4: Simplify right side
    77,071.25x = 2,417,519,059.68
  5. Step 5: Solve for x
    x = 2,417,519,059.68/77,071.25
  6. Step 6: Final answer
    x = 31,367.33

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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.