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Finding the Fourth Proportional to 69,678.88, 104,535.68 and 20,430.88

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Solution

The fourth proportional to 69,678.88, 104,535.68 and 20,430.88 is: 30,651.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,678.88 : 104,535.68 = 20,430.88 : x
  2. Step 2: Convert to fraction form
    69,678.88/104,535.68 = 20,430.88/x
  3. Step 3: Cross multiply
    69,678.88x = 104,535.68 × 20,430.88
  4. Step 4: Simplify right side
    69,678.88x = 2,135,755,933.80
  5. Step 5: Solve for x
    x = 2,135,755,933.80/69,678.88
  6. Step 6: Final answer
    x = 30,651.41

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1.5x scale

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.