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Finding the Fourth Proportional to 65,722.20, 98,583.30 and 40,790.40

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Solution

The fourth proportional to 65,722.20, 98,583.30 and 40,790.40 is: 61,185.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,722.20 : 98,583.30 = 40,790.40 : x
  2. Step 2: Convert to fraction form
    65,722.20/98,583.30 = 40,790.40/x
  3. Step 3: Cross multiply
    65,722.20x = 98,583.30 × 40,790.40
  4. Step 4: Simplify right side
    65,722.20x = 4,021,252,240.32
  5. Step 5: Solve for x
    x = 4,021,252,240.32/65,722.20
  6. Step 6: Final answer
    x = 61,185.60

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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.