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Finding the Fourth Proportional to 81,262.44, 112,142.28 and 45,453

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Solution

The fourth proportional to 81,262.44, 112,142.28 and 45,453 is: 62,725.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,262.44 : 112,142.28 = 45,453 : x
  2. Step 2: Convert to fraction form
    81,262.44/112,142.28 = 45,453/x
  3. Step 3: Cross multiply
    81,262.44x = 112,142.28 × 45,453
  4. Step 4: Simplify right side
    81,262.44x = 5,097,203,052.84
  5. Step 5: Solve for x
    x = 5,097,203,052.84/81,262.44
  6. Step 6: Final answer
    x = 62,725.20

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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.