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Finding the Fourth Proportional to 86,520.80, 119,389.20 and 68,660.30

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Solution

The fourth proportional to 86,520.80, 119,389.20 and 68,660.30 is: 94,743.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,520.80 : 119,389.20 = 68,660.30 : x
  2. Step 2: Convert to fraction form
    86,520.80/119,389.20 = 68,660.30/x
  3. Step 3: Cross multiply
    86,520.80x = 119,389.20 × 68,660.30
  4. Step 4: Simplify right side
    86,520.80x = 8,197,298,288.76
  5. Step 5: Solve for x
    x = 8,197,298,288.76/86,520.80
  6. Step 6: Final answer
    x = 94,743.67

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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.