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Finding the Fourth Proportional to 50,705.28, 69,993 and 45,390.78

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Solution

The fourth proportional to 50,705.28, 69,993 and 45,390.78 is: 62,656.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,705.28 : 69,993 = 45,390.78 : x
  2. Step 2: Convert to fraction form
    50,705.28/69,993 = 45,390.78/x
  3. Step 3: Cross multiply
    50,705.28x = 69,993 × 45,390.78
  4. Step 4: Simplify right side
    50,705.28x = 3,177,036,864.54
  5. Step 5: Solve for x
    x = 3,177,036,864.54/50,705.28
  6. Step 6: Final answer
    x = 62,656.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.