Home / 56,629.75-78,149.11-31,136.55

Finding the Fourth Proportional to 56,629.75, 78,149.11 and 31,136.55

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Solution

The fourth proportional to 56,629.75, 78,149.11 and 31,136.55 is: 42,968.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,629.75 : 78,149.11 = 31,136.55 : x
  2. Step 2: Convert to fraction form
    56,629.75/78,149.11 = 31,136.55/x
  3. Step 3: Cross multiply
    56,629.75x = 78,149.11 × 31,136.55
  4. Step 4: Simplify right side
    56,629.75x = 2,433,293,670.97
  5. Step 5: Solve for x
    x = 2,433,293,670.97/56,629.75
  6. Step 6: Final answer
    x = 42,968.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.