Home / 78,012.10-117,023.82-25,419.34

Finding the Fourth Proportional to 78,012.10, 117,023.82 and 25,419.34

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Solution

The fourth proportional to 78,012.10, 117,023.82 and 25,419.34 is: 38,130.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,012.10 : 117,023.82 = 25,419.34 : x
  2. Step 2: Convert to fraction form
    78,012.10/117,023.82 = 25,419.34/x
  3. Step 3: Cross multiply
    78,012.10x = 117,023.82 × 25,419.34
  4. Step 4: Simplify right side
    78,012.10x = 2,974,668,268.68
  5. Step 5: Solve for x
    x = 2,974,668,268.68/78,012.10
  6. Step 6: Final answer
    x = 38,130.86

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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.