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Finding the Fourth Proportional to 135,358.79, 186,792.86 and 74,928.15

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Solution

The fourth proportional to 135,358.79, 186,792.86 and 74,928.15 is: 103,399.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,358.79 : 186,792.86 = 74,928.15 : x
  2. Step 2: Convert to fraction form
    135,358.79/186,792.86 = 74,928.15/x
  3. Step 3: Cross multiply
    135,358.79x = 186,792.86 × 74,928.15
  4. Step 4: Simplify right side
    135,358.79x = 13,996,043,620.33
  5. Step 5: Solve for x
    x = 13,996,043,620.33/135,358.79
  6. Step 6: Final answer
    x = 103,399.60

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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.