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Finding the Fourth Proportional to 85,843.15, 128,819.40 and 50,304.40

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Solution

The fourth proportional to 85,843.15, 128,819.40 and 50,304.40 is: 75,488.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,843.15 : 128,819.40 = 50,304.40 : x
  2. Step 2: Convert to fraction form
    85,843.15/128,819.40 = 50,304.40/x
  3. Step 3: Cross multiply
    85,843.15x = 128,819.40 × 50,304.40
  4. Step 4: Simplify right side
    85,843.15x = 6,480,182,625.36
  5. Step 5: Solve for x
    x = 6,480,182,625.36/85,843.15
  6. Step 6: Final answer
    x = 75,488.64

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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.