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Finding the Fourth Proportional to 81,013.42, 111,798.49 and 45,203.42

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Solution

The fourth proportional to 81,013.42, 111,798.49 and 45,203.42 is: 62,380.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,013.42 : 111,798.49 = 45,203.42 : x
  2. Step 2: Convert to fraction form
    81,013.42/111,798.49 = 45,203.42/x
  3. Step 3: Cross multiply
    81,013.42x = 111,798.49 × 45,203.42
  4. Step 4: Simplify right side
    81,013.42x = 5,053,674,098.84
  5. Step 5: Solve for x
    x = 5,053,674,098.84/81,013.42
  6. Step 6: Final answer
    x = 62,380.70

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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.