Home / 78,507.36-117,749.43-25,917.30

Finding the Fourth Proportional to 78,507.36, 117,749.43 and 25,917.30

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Solution

The fourth proportional to 78,507.36, 117,749.43 and 25,917.30 is: 38,872.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,507.36 : 117,749.43 = 25,917.30 : x
  2. Step 2: Convert to fraction form
    78,507.36/117,749.43 = 25,917.30/x
  3. Step 3: Cross multiply
    78,507.36x = 117,749.43 × 25,917.30
  4. Step 4: Simplify right side
    78,507.36x = 3,051,747,302.14
  5. Step 5: Solve for x
    x = 3,051,747,302.14/78,507.36
  6. Step 6: Final answer
    x = 38,872.12

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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.