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Finding the Fourth Proportional to 135,478.89, 186,958.42 and 75,049.35

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Solution

The fourth proportional to 135,478.89, 186,958.42 and 75,049.35 is: 103,566.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,478.89 : 186,958.42 = 75,049.35 : x
  2. Step 2: Convert to fraction form
    135,478.89/186,958.42 = 75,049.35/x
  3. Step 3: Cross multiply
    135,478.89x = 186,958.42 × 75,049.35
  4. Step 4: Simplify right side
    135,478.89x = 14,031,107,710.40
  5. Step 5: Solve for x
    x = 14,031,107,710.40/135,478.89
  6. Step 6: Final answer
    x = 103,566.74

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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.