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Finding the Fourth Proportional to 85,820.55, 128,732.03 and 26,652.48

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Solution

The fourth proportional to 85,820.55, 128,732.03 and 26,652.48 is: 39,979.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,820.55 : 128,732.03 = 26,652.48 : x
  2. Step 2: Convert to fraction form
    85,820.55/128,732.03 = 26,652.48/x
  3. Step 3: Cross multiply
    85,820.55x = 128,732.03 × 26,652.48
  4. Step 4: Simplify right side
    85,820.55x = 3,431,027,721.67
  5. Step 5: Solve for x
    x = 3,431,027,721.67/85,820.55
  6. Step 6: Final answer
    x = 39,979.09

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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.