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Finding the Fourth Proportional to 135,369.60, 186,811.20 and 74,938.56

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Solution

The fourth proportional to 135,369.60, 186,811.20 and 74,938.56 is: 103,415.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,369.60 : 186,811.20 = 74,938.56 : x
  2. Step 2: Convert to fraction form
    135,369.60/186,811.20 = 74,938.56/x
  3. Step 3: Cross multiply
    135,369.60x = 186,811.20 × 74,938.56
  4. Step 4: Simplify right side
    135,369.60x = 13,999,362,319.87
  5. Step 5: Solve for x
    x = 13,999,362,319.87/135,369.60
  6. Step 6: Final answer
    x = 103,415.85

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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.