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Finding the Fourth Proportional to 65,820.80, 98,682.60 and 28,350.20

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Solution

The fourth proportional to 65,820.80, 98,682.60 and 28,350.20 is: 42,504.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,820.80 : 98,682.60 = 28,350.20 : x
  2. Step 2: Convert to fraction form
    65,820.80/98,682.60 = 28,350.20/x
  3. Step 3: Cross multiply
    65,820.80x = 98,682.60 × 28,350.20
  4. Step 4: Simplify right side
    65,820.80x = 2,797,671,446.52
  5. Step 5: Solve for x
    x = 2,797,671,446.52/65,820.80
  6. Step 6: Final answer
    x = 42,504.37

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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.