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Finding the Fourth Proportional to 135,385.92, 186,825.72 and 74,958.24

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Solution

The fourth proportional to 135,385.92, 186,825.72 and 74,958.24 is: 103,438.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,385.92 : 186,825.72 = 74,958.24 : x
  2. Step 2: Convert to fraction form
    135,385.92/186,825.72 = 74,958.24/x
  3. Step 3: Cross multiply
    135,385.92x = 186,825.72 × 74,958.24
  4. Step 4: Simplify right side
    135,385.92x = 14,004,127,157.93
  5. Step 5: Solve for x
    x = 14,004,127,157.93/135,385.92
  6. Step 6: Final answer
    x = 103,438.58

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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.