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Finding the Fourth Proportional to 85,995.72, 128,943.76 and 33,343.56

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Solution

The fourth proportional to 85,995.72, 128,943.76 and 33,343.56 is: 49,996.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,995.72 : 128,943.76 = 33,343.56 : x
  2. Step 2: Convert to fraction form
    85,995.72/128,943.76 = 33,343.56/x
  3. Step 3: Cross multiply
    85,995.72x = 128,943.76 × 33,343.56
  4. Step 4: Simplify right side
    85,995.72x = 4,299,443,998.19
  5. Step 5: Solve for x
    x = 4,299,443,998.19/85,995.72
  6. Step 6: Final answer
    x = 49,996.02

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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.