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Finding the Fourth Proportional to 89,356.40, 133,919.40 and 68,476.40

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Solution

The fourth proportional to 89,356.40, 133,919.40 and 68,476.40 is: 102,626.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,356.40 : 133,919.40 = 68,476.40 : x
  2. Step 2: Convert to fraction form
    89,356.40/133,919.40 = 68,476.40/x
  3. Step 3: Cross multiply
    89,356.40x = 133,919.40 × 68,476.40
  4. Step 4: Simplify right side
    89,356.40x = 9,170,318,402.16
  5. Step 5: Solve for x
    x = 9,170,318,402.16/89,356.40
  6. Step 6: Final answer
    x = 102,626.32

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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.