Home / 61,721.28-85,144.32-40,497.60

Finding the Fourth Proportional to 61,721.28, 85,144.32 and 40,497.60

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Solution

The fourth proportional to 61,721.28, 85,144.32 and 40,497.60 is: 55,866.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,721.28 : 85,144.32 = 40,497.60 : x
  2. Step 2: Convert to fraction form
    61,721.28/85,144.32 = 40,497.60/x
  3. Step 3: Cross multiply
    61,721.28x = 85,144.32 × 40,497.60
  4. Step 4: Simplify right side
    61,721.28x = 3,448,140,613.63
  5. Step 5: Solve for x
    x = 3,448,140,613.63/61,721.28
  6. Step 6: Final answer
    x = 55,866.32

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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.