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Finding the Fourth Proportional to 55,082.68, 76,009.80 and 31,213.09

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Solution

The fourth proportional to 55,082.68, 76,009.80 and 31,213.09 is: 43,071.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,082.68 : 76,009.80 = 31,213.09 : x
  2. Step 2: Convert to fraction form
    55,082.68/76,009.80 = 31,213.09/x
  3. Step 3: Cross multiply
    55,082.68x = 76,009.80 × 31,213.09
  4. Step 4: Simplify right side
    55,082.68x = 2,372,500,728.28
  5. Step 5: Solve for x
    x = 2,372,500,728.28/55,082.68
  6. Step 6: Final answer
    x = 43,071.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.