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Finding the Fourth Proportional to 65,696.80, 98,431.80 and 30,564.40

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Solution

The fourth proportional to 65,696.80, 98,431.80 and 30,564.40 is: 45,793.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,696.80 : 98,431.80 = 30,564.40 : x
  2. Step 2: Convert to fraction form
    65,696.80/98,431.80 = 30,564.40/x
  3. Step 3: Cross multiply
    65,696.80x = 98,431.80 × 30,564.40
  4. Step 4: Simplify right side
    65,696.80x = 3,008,508,907.92
  5. Step 5: Solve for x
    x = 3,008,508,907.92/65,696.80
  6. Step 6: Final answer
    x = 45,793.84

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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.