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Finding the Fourth Proportional to 135,399.33, 186,861.59 and 74,975.60

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Solution

The fourth proportional to 135,399.33, 186,861.59 and 74,975.60 is: 103,472.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,399.33 : 186,861.59 = 74,975.60 : x
  2. Step 2: Convert to fraction form
    135,399.33/186,861.59 = 74,975.60/x
  3. Step 3: Cross multiply
    135,399.33x = 186,861.59 × 74,975.60
  4. Step 4: Simplify right side
    135,399.33x = 14,010,058,518.02
  5. Step 5: Solve for x
    x = 14,010,058,518.02/135,399.33
  6. Step 6: Final answer
    x = 103,472.14

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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.