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Finding the Fourth Proportional to 63,086.40, 87,028.80 and 39,240.96

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Solution

The fourth proportional to 63,086.40, 87,028.80 and 39,240.96 is: 54,133.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,086.40 : 87,028.80 = 39,240.96 : x
  2. Step 2: Convert to fraction form
    63,086.40/87,028.80 = 39,240.96/x
  3. Step 3: Cross multiply
    63,086.40x = 87,028.80 × 39,240.96
  4. Step 4: Simplify right side
    63,086.40x = 3,415,093,659.65
  5. Step 5: Solve for x
    x = 3,415,093,659.65/63,086.40
  6. Step 6: Final answer
    x = 54,133.60

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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.