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Finding the Fourth Proportional to 50,878.50, 70,209.88 and 28,215.72

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Solution

The fourth proportional to 50,878.50, 70,209.88 and 28,215.72 is: 38,936.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,878.50 : 70,209.88 = 28,215.72 : x
  2. Step 2: Convert to fraction form
    50,878.50/70,209.88 = 28,215.72/x
  3. Step 3: Cross multiply
    50,878.50x = 70,209.88 × 28,215.72
  4. Step 4: Simplify right side
    50,878.50x = 1,981,022,315.31
  5. Step 5: Solve for x
    x = 1,981,022,315.31/50,878.50
  6. Step 6: Final answer
    x = 38,936.33

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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.