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Finding the Fourth Proportional to 89,662.40, 134,493.60 and 61,668.80

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Solution

The fourth proportional to 89,662.40, 134,493.60 and 61,668.80 is: 92,503.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,662.40 : 134,493.60 = 61,668.80 : x
  2. Step 2: Convert to fraction form
    89,662.40/134,493.60 = 61,668.80/x
  3. Step 3: Cross multiply
    89,662.40x = 134,493.60 × 61,668.80
  4. Step 4: Simplify right side
    89,662.40x = 8,294,058,919.68
  5. Step 5: Solve for x
    x = 8,294,058,919.68/89,662.40
  6. Step 6: Final answer
    x = 92,503.20

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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.