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Finding the Fourth Proportional to 81,617.48, 112,629.24 and 45,809.52

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Solution

The fourth proportional to 81,617.48, 112,629.24 and 45,809.52 is: 63,215.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,617.48 : 112,629.24 = 45,809.52 : x
  2. Step 2: Convert to fraction form
    81,617.48/112,629.24 = 45,809.52/x
  3. Step 3: Cross multiply
    81,617.48x = 112,629.24 × 45,809.52
  4. Step 4: Simplify right side
    81,617.48x = 5,159,491,422.36
  5. Step 5: Solve for x
    x = 5,159,491,422.36/81,617.48
  6. Step 6: Final answer
    x = 63,215.52

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1.5x scale

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.