Home / 78,085.44-117,150.03-31,371.12

Finding the Fourth Proportional to 78,085.44, 117,150.03 and 31,371.12

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Solution

The fourth proportional to 78,085.44, 117,150.03 and 31,371.12 is: 47,065.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,085.44 : 117,150.03 = 31,371.12 : x
  2. Step 2: Convert to fraction form
    78,085.44/117,150.03 = 31,371.12/x
  3. Step 3: Cross multiply
    78,085.44x = 117,150.03 × 31,371.12
  4. Step 4: Simplify right side
    78,085.44x = 3,675,127,649.13
  5. Step 5: Solve for x
    x = 3,675,127,649.13/78,085.44
  6. Step 6: Final answer
    x = 47,065.47

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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.