Home / 87,470.28-120,688.38-64,861.56

Finding the Fourth Proportional to 87,470.28, 120,688.38 and 64,861.56

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Solution

The fourth proportional to 87,470.28, 120,688.38 and 64,861.56 is: 89,493.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,470.28 : 120,688.38 = 64,861.56 : x
  2. Step 2: Convert to fraction form
    87,470.28/120,688.38 = 64,861.56/x
  3. Step 3: Cross multiply
    87,470.28x = 120,688.38 × 64,861.56
  4. Step 4: Simplify right side
    87,470.28x = 7,828,036,600.67
  5. Step 5: Solve for x
    x = 7,828,036,600.67/87,470.28
  6. Step 6: Final answer
    x = 89,493.67

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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.