Home / 78,372.45-117,566.87-25,786.08

Finding the Fourth Proportional to 78,372.45, 117,566.87 and 25,786.08

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Solution

The fourth proportional to 78,372.45, 117,566.87 and 25,786.08 is: 38,681.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,372.45 : 117,566.87 = 25,786.08 : x
  2. Step 2: Convert to fraction form
    78,372.45/117,566.87 = 25,786.08/x
  3. Step 3: Cross multiply
    78,372.45x = 117,566.87 × 25,786.08
  4. Step 4: Simplify right side
    78,372.45x = 3,031,588,586.24
  5. Step 5: Solve for x
    x = 3,031,588,586.24/78,372.45
  6. Step 6: Final answer
    x = 38,681.81

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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.