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Finding the Fourth Proportional to 85,886.39, 128,769.22 and 37,832.20

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Solution

The fourth proportional to 85,886.39, 128,769.22 and 37,832.20 is: 56,721.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,886.39 : 128,769.22 = 37,832.20 : x
  2. Step 2: Convert to fraction form
    85,886.39/128,769.22 = 37,832.20/x
  3. Step 3: Cross multiply
    85,886.39x = 128,769.22 × 37,832.20
  4. Step 4: Simplify right side
    85,886.39x = 4,871,622,884.88
  5. Step 5: Solve for x
    x = 4,871,622,884.88/85,886.39
  6. Step 6: Final answer
    x = 56,721.71

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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.