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Finding the Fourth Proportional to 135,484.68, 186,847.02 and 87,688.20

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Solution

The fourth proportional to 135,484.68, 186,847.02 and 87,688.20 is: 120,930.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,484.68 : 186,847.02 = 87,688.20 : x
  2. Step 2: Convert to fraction form
    135,484.68/186,847.02 = 87,688.20/x
  3. Step 3: Cross multiply
    135,484.68x = 186,847.02 × 87,688.20
  4. Step 4: Simplify right side
    135,484.68x = 16,384,278,859.16
  5. Step 5: Solve for x
    x = 16,384,278,859.16/135,484.68
  6. Step 6: Final answer
    x = 120,930.86

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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.