Home / 55,131.20-82,502.40-38,412.80

Finding the Fourth Proportional to 55,131.20, 82,502.40 and 38,412.80

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Solution

The fourth proportional to 55,131.20, 82,502.40 and 38,412.80 is: 57,483.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,131.20 : 82,502.40 = 38,412.80 : x
  2. Step 2: Convert to fraction form
    55,131.20/82,502.40 = 38,412.80/x
  3. Step 3: Cross multiply
    55,131.20x = 82,502.40 × 38,412.80
  4. Step 4: Simplify right side
    55,131.20x = 3,169,148,190.72
  5. Step 5: Solve for x
    x = 3,169,148,190.72/55,131.20
  6. Step 6: Final answer
    x = 57,483.75

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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.