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Finding the Fourth Proportional to 133,243.58, 183,878.78 and 72,817.97

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Solution

The fourth proportional to 133,243.58, 183,878.78 and 72,817.97 is: 100,490.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,243.58 : 183,878.78 = 72,817.97 : x
  2. Step 2: Convert to fraction form
    133,243.58/183,878.78 = 72,817.97/x
  3. Step 3: Cross multiply
    133,243.58x = 183,878.78 × 72,817.97
  4. Step 4: Simplify right side
    133,243.58x = 13,389,678,202.19
  5. Step 5: Solve for x
    x = 13,389,678,202.19/133,243.58
  6. Step 6: Final answer
    x = 100,490.23

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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.