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Finding the Fourth Proportional to 281,373.80, 422,060.70 and 81,693.80

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Solution

The fourth proportional to 281,373.80, 422,060.70 and 81,693.80 is: 122,540.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,373.80 : 422,060.70 = 81,693.80 : x
  2. Step 2: Convert to fraction form
    281,373.80/422,060.70 = 81,693.80/x
  3. Step 3: Cross multiply
    281,373.80x = 422,060.70 × 81,693.80
  4. Step 4: Simplify right side
    281,373.80x = 34,479,742,413.66
  5. Step 5: Solve for x
    x = 34,479,742,413.66/281,373.80
  6. Step 6: Final answer
    x = 122,540.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.