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Finding the Fourth Proportional to 81,745.80, 112,812.54 and 45,935.70

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Solution

The fourth proportional to 81,745.80, 112,812.54 and 45,935.70 is: 63,393.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,745.80 : 112,812.54 = 45,935.70 : x
  2. Step 2: Convert to fraction form
    81,745.80/112,812.54 = 45,935.70/x
  3. Step 3: Cross multiply
    81,745.80x = 112,812.54 × 45,935.70
  4. Step 4: Simplify right side
    81,745.80x = 5,182,122,993.68
  5. Step 5: Solve for x
    x = 5,182,122,993.68/81,745.80
  6. Step 6: Final answer
    x = 63,393.14

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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.