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Finding the Fourth Proportional to 81,679.41, 112,713.54 and 45,870.93

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Solution

The fourth proportional to 81,679.41, 112,713.54 and 45,870.93 is: 63,299.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,679.41 : 112,713.54 = 45,870.93 : x
  2. Step 2: Convert to fraction form
    81,679.41/112,713.54 = 45,870.93/x
  3. Step 3: Cross multiply
    81,679.41x = 112,713.54 × 45,870.93
  4. Step 4: Simplify right side
    81,679.41x = 5,170,274,903.39
  5. Step 5: Solve for x
    x = 5,170,274,903.39/81,679.41
  6. Step 6: Final answer
    x = 63,299.61

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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.