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Finding the Fourth Proportional to 81,018.80, 111,848.01 and 59,190.62

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Solution

The fourth proportional to 81,018.80, 111,848.01 and 59,190.62 is: 81,713.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,018.80 : 111,848.01 = 59,190.62 : x
  2. Step 2: Convert to fraction form
    81,018.80/111,848.01 = 59,190.62/x
  3. Step 3: Cross multiply
    81,018.80x = 111,848.01 × 59,190.62
  4. Step 4: Simplify right side
    81,018.80x = 6,620,352,276.46
  5. Step 5: Solve for x
    x = 6,620,352,276.46/81,018.80
  6. Step 6: Final answer
    x = 81,713.78

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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.