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Finding the Fourth Proportional to 89,861.76, 134,909.28 and 69,099.84

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Solution

The fourth proportional to 89,861.76, 134,909.28 and 69,099.84 is: 103,739.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,861.76 : 134,909.28 = 69,099.84 : x
  2. Step 2: Convert to fraction form
    89,861.76/134,909.28 = 69,099.84/x
  3. Step 3: Cross multiply
    89,861.76x = 134,909.28 × 69,099.84
  4. Step 4: Simplify right side
    89,861.76x = 9,322,209,662.52
  5. Step 5: Solve for x
    x = 9,322,209,662.52/89,861.76
  6. Step 6: Final answer
    x = 103,739.45

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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.