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Finding the Fourth Proportional to 50,728.80, 75,947.40 and 31,045.80

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Solution

The fourth proportional to 50,728.80, 75,947.40 and 31,045.80 is: 46,479.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,728.80 : 75,947.40 = 31,045.80 : x
  2. Step 2: Convert to fraction form
    50,728.80/75,947.40 = 31,045.80/x
  3. Step 3: Cross multiply
    50,728.80x = 75,947.40 × 31,045.80
  4. Step 4: Simplify right side
    50,728.80x = 2,357,847,790.92
  5. Step 5: Solve for x
    x = 2,357,847,790.92/50,728.80
  6. Step 6: Final answer
    x = 46,479.47

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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.