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Finding the Fourth Proportional to 135,632.76, 187,171.02 and 74,378.76

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Solution

The fourth proportional to 135,632.76, 187,171.02 and 74,378.76 is: 102,641.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,632.76 : 187,171.02 = 74,378.76 : x
  2. Step 2: Convert to fraction form
    135,632.76/187,171.02 = 74,378.76/x
  3. Step 3: Cross multiply
    135,632.76x = 187,171.02 × 74,378.76
  4. Step 4: Simplify right side
    135,632.76x = 13,921,548,375.54
  5. Step 5: Solve for x
    x = 13,921,548,375.54/135,632.76
  6. Step 6: Final answer
    x = 102,641.49

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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.