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Finding the Fourth Proportional to 89,322.40, 133,868.40 and 68,442.40

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Solution

The fourth proportional to 89,322.40, 133,868.40 and 68,442.40 is: 102,575.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,322.40 : 133,868.40 = 68,442.40 : x
  2. Step 2: Convert to fraction form
    89,322.40/133,868.40 = 68,442.40/x
  3. Step 3: Cross multiply
    89,322.40x = 133,868.40 × 68,442.40
  4. Step 4: Simplify right side
    89,322.40x = 9,162,274,580.16
  5. Step 5: Solve for x
    x = 9,162,274,580.16/89,322.40
  6. Step 6: Final answer
    x = 102,575.33

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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.