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Finding the Fourth Proportional to 85,493.61, 128,200.05 and 49,965.12

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Solution

The fourth proportional to 85,493.61, 128,200.05 and 49,965.12 is: 74,924.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,493.61 : 128,200.05 = 49,965.12 : x
  2. Step 2: Convert to fraction form
    85,493.61/128,200.05 = 49,965.12/x
  3. Step 3: Cross multiply
    85,493.61x = 128,200.05 × 49,965.12
  4. Step 4: Simplify right side
    85,493.61x = 6,405,530,882.26
  5. Step 5: Solve for x
    x = 6,405,530,882.26/85,493.61
  6. Step 6: Final answer
    x = 74,924.09

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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.