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Finding the Fourth Proportional to 69,648.40, 104,472.60 and 20,400.40

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Solution

The fourth proportional to 69,648.40, 104,472.60 and 20,400.40 is: 30,600.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,648.40 : 104,472.60 = 20,400.40 : x
  2. Step 2: Convert to fraction form
    69,648.40/104,472.60 = 20,400.40/x
  3. Step 3: Cross multiply
    69,648.40x = 104,472.60 × 20,400.40
  4. Step 4: Simplify right side
    69,648.40x = 2,131,282,829.04
  5. Step 5: Solve for x
    x = 2,131,282,829.04/69,648.40
  6. Step 6: Final answer
    x = 30,600.60

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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.