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Finding the Fourth Proportional to 89,782.80, 134,965.80 and 63,668.40

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Solution

The fourth proportional to 89,782.80, 134,965.80 and 63,668.40 is: 95,709.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,782.80 : 134,965.80 = 63,668.40 : x
  2. Step 2: Convert to fraction form
    89,782.80/134,965.80 = 63,668.40/x
  3. Step 3: Cross multiply
    89,782.80x = 134,965.80 × 63,668.40
  4. Step 4: Simplify right side
    89,782.80x = 8,593,056,540.72
  5. Step 5: Solve for x
    x = 8,593,056,540.72/89,782.80
  6. Step 6: Final answer
    x = 95,709.38

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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.