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Finding the Fourth Proportional to 85,992.68, 128,955.81 and 33,395.06

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Solution

The fourth proportional to 85,992.68, 128,955.81 and 33,395.06 is: 50,079.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,992.68 : 128,955.81 = 33,395.06 : x
  2. Step 2: Convert to fraction form
    85,992.68/128,955.81 = 33,395.06/x
  3. Step 3: Cross multiply
    85,992.68x = 128,955.81 × 33,395.06
  4. Step 4: Simplify right side
    85,992.68x = 4,306,487,012.30
  5. Step 5: Solve for x
    x = 4,306,487,012.30/85,992.68
  6. Step 6: Final answer
    x = 50,079.69

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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.