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Finding the Fourth Proportional to 86,031.48, 128,997 and 33,379.46

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Solution

The fourth proportional to 86,031.48, 128,997 and 33,379.46 is: 50,049.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,031.48 : 128,997 = 33,379.46 : x
  2. Step 2: Convert to fraction form
    86,031.48/128,997 = 33,379.46/x
  3. Step 3: Cross multiply
    86,031.48x = 128,997 × 33,379.46
  4. Step 4: Simplify right side
    86,031.48x = 4,305,849,556.64
  5. Step 5: Solve for x
    x = 4,305,849,556.64/86,031.48
  6. Step 6: Final answer
    x = 50,049.70

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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.