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Finding the Fourth Proportional to 89,813.60, 134,320.08 and 67,379.84

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Solution

The fourth proportional to 89,813.60, 134,320.08 and 67,379.84 is: 100,769.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,813.60 : 134,320.08 = 67,379.84 : x
  2. Step 2: Convert to fraction form
    89,813.60/134,320.08 = 67,379.84/x
  3. Step 3: Cross multiply
    89,813.60x = 134,320.08 × 67,379.84
  4. Step 4: Simplify right side
    89,813.60x = 9,050,465,499.19
  5. Step 5: Solve for x
    x = 9,050,465,499.19/89,813.60
  6. Step 6: Final answer
    x = 100,769.43

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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.