Home / 55,780.20-83,670.03-20,719.80

Finding the Fourth Proportional to 55,780.20, 83,670.03 and 20,719.80

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Solution

The fourth proportional to 55,780.20, 83,670.03 and 20,719.80 is: 31,079.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,780.20 : 83,670.03 = 20,719.80 : x
  2. Step 2: Convert to fraction form
    55,780.20/83,670.03 = 20,719.80/x
  3. Step 3: Cross multiply
    55,780.20x = 83,670.03 × 20,719.80
  4. Step 4: Simplify right side
    55,780.20x = 1,733,626,287.59
  5. Step 5: Solve for x
    x = 1,733,626,287.59/55,780.20
  6. Step 6: Final answer
    x = 31,079.60

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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.