Home / 56,716.80-85,021.20-21,168.60

Finding the Fourth Proportional to 56,716.80, 85,021.20 and 21,168.60

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Solution

The fourth proportional to 56,716.80, 85,021.20 and 21,168.60 is: 31,732.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,716.80 : 85,021.20 = 21,168.60 : x
  2. Step 2: Convert to fraction form
    56,716.80/85,021.20 = 21,168.60/x
  3. Step 3: Cross multiply
    56,716.80x = 85,021.20 × 21,168.60
  4. Step 4: Simplify right side
    56,716.80x = 1,799,779,774.32
  5. Step 5: Solve for x
    x = 1,799,779,774.32/56,716.80
  6. Step 6: Final answer
    x = 31,732.75

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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.