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Finding the Fourth Proportional to 85,990.68, 128,952.81 and 33,393.06

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Solution

The fourth proportional to 85,990.68, 128,952.81 and 33,393.06 is: 50,076.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,990.68 : 128,952.81 = 33,393.06 : x
  2. Step 2: Convert to fraction form
    85,990.68/128,952.81 = 33,393.06/x
  3. Step 3: Cross multiply
    85,990.68x = 128,952.81 × 33,393.06
  4. Step 4: Simplify right side
    85,990.68x = 4,306,128,921.50
  5. Step 5: Solve for x
    x = 4,306,128,921.50/85,990.68
  6. Step 6: Final answer
    x = 50,076.69

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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.