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Finding the Fourth Proportional to 85,394.67, 128,108.75 and 32,800.11

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Solution

The fourth proportional to 85,394.67, 128,108.75 and 32,800.11 is: 49,206.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,394.67 : 128,108.75 = 32,800.11 : x
  2. Step 2: Convert to fraction form
    85,394.67/128,108.75 = 32,800.11/x
  3. Step 3: Cross multiply
    85,394.67x = 128,108.75 × 32,800.11
  4. Step 4: Simplify right side
    85,394.67x = 4,201,980,927.96
  5. Step 5: Solve for x
    x = 4,201,980,927.96/85,394.67
  6. Step 6: Final answer
    x = 49,206.59

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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.