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Finding the Fourth Proportional to 56,642.52, 84,965.04 and 20,617.80

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Solution

The fourth proportional to 56,642.52, 84,965.04 and 20,617.80 is: 30,927.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,642.52 : 84,965.04 = 20,617.80 : x
  2. Step 2: Convert to fraction form
    56,642.52/84,965.04 = 20,617.80/x
  3. Step 3: Cross multiply
    56,642.52x = 84,965.04 × 20,617.80
  4. Step 4: Simplify right side
    56,642.52x = 1,751,792,201.71
  5. Step 5: Solve for x
    x = 1,751,792,201.71/56,642.52
  6. Step 6: Final answer
    x = 30,927.16

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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.