Home / 78,369.20-117,562.02-25,782.80

Finding the Fourth Proportional to 78,369.20, 117,562.02 and 25,782.80

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Solution

The fourth proportional to 78,369.20, 117,562.02 and 25,782.80 is: 38,676.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,369.20 : 117,562.02 = 25,782.80 : x
  2. Step 2: Convert to fraction form
    78,369.20/117,562.02 = 25,782.80/x
  3. Step 3: Cross multiply
    78,369.20x = 117,562.02 × 25,782.80
  4. Step 4: Simplify right side
    78,369.20x = 3,031,078,049.26
  5. Step 5: Solve for x
    x = 3,031,078,049.26/78,369.20
  6. Step 6: Final answer
    x = 38,676.90

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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.