Home / 55,139.20-82,514.40-38,420.80

Finding the Fourth Proportional to 55,139.20, 82,514.40 and 38,420.80

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Solution

The fourth proportional to 55,139.20, 82,514.40 and 38,420.80 is: 57,495.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,139.20 : 82,514.40 = 38,420.80 : x
  2. Step 2: Convert to fraction form
    55,139.20/82,514.40 = 38,420.80/x
  3. Step 3: Cross multiply
    55,139.20x = 82,514.40 × 38,420.80
  4. Step 4: Simplify right side
    55,139.20x = 3,170,269,259.52
  5. Step 5: Solve for x
    x = 3,170,269,259.52/55,139.20
  6. Step 6: Final answer
    x = 57,495.74

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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.