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Finding the Fourth Proportional to 90,571.36, 124,968.64 and 54,760.80

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Solution

The fourth proportional to 90,571.36, 124,968.64 and 54,760.80 is: 75,557.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,571.36 : 124,968.64 = 54,760.80 : x
  2. Step 2: Convert to fraction form
    90,571.36/124,968.64 = 54,760.80/x
  3. Step 3: Cross multiply
    90,571.36x = 124,968.64 × 54,760.80
  4. Step 4: Simplify right side
    90,571.36x = 6,843,382,701.31
  5. Step 5: Solve for x
    x = 6,843,382,701.31/90,571.36
  6. Step 6: Final answer
    x = 75,557.91

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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.