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Finding the Fourth Proportional to 57,288.80, 85,760.40 and 50,376.80

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Solution

The fourth proportional to 57,288.80, 85,760.40 and 50,376.80 is: 75,413.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,288.80 : 85,760.40 = 50,376.80 : x
  2. Step 2: Convert to fraction form
    57,288.80/85,760.40 = 50,376.80/x
  3. Step 3: Cross multiply
    57,288.80x = 85,760.40 × 50,376.80
  4. Step 4: Simplify right side
    57,288.80x = 4,320,334,518.72
  5. Step 5: Solve for x
    x = 4,320,334,518.72/57,288.80
  6. Step 6: Final answer
    x = 75,413.25

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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.