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Finding the Fourth Proportional to 69,028.80, 103,543.20 and 65,748.30

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Solution

The fourth proportional to 69,028.80, 103,543.20 and 65,748.30 is: 98,622.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,028.80 : 103,543.20 = 65,748.30 : x
  2. Step 2: Convert to fraction form
    69,028.80/103,543.20 = 65,748.30/x
  3. Step 3: Cross multiply
    69,028.80x = 103,543.20 × 65,748.30
  4. Step 4: Simplify right side
    69,028.80x = 6,807,789,376.56
  5. Step 5: Solve for x
    x = 6,807,789,376.56/69,028.80
  6. Step 6: Final answer
    x = 98,622.45

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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.