Home / 87,641.20-131,429.40-28,478.80

Finding the Fourth Proportional to 87,641.20, 131,429.40 and 28,478.80

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Solution

The fourth proportional to 87,641.20, 131,429.40 and 28,478.80 is: 42,707.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,641.20 : 131,429.40 = 28,478.80 : x
  2. Step 2: Convert to fraction form
    87,641.20/131,429.40 = 28,478.80/x
  3. Step 3: Cross multiply
    87,641.20x = 131,429.40 × 28,478.80
  4. Step 4: Simplify right side
    87,641.20x = 3,742,951,596.72
  5. Step 5: Solve for x
    x = 3,742,951,596.72/87,641.20
  6. Step 6: Final answer
    x = 42,707.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.