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Finding the Fourth Proportional to 85,751.11, 128,670.54 and 40,823.25

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Solution

The fourth proportional to 85,751.11, 128,670.54 and 40,823.25 is: 61,255.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,751.11 : 128,670.54 = 40,823.25 : x
  2. Step 2: Convert to fraction form
    85,751.11/128,670.54 = 40,823.25/x
  3. Step 3: Cross multiply
    85,751.11x = 128,670.54 × 40,823.25
  4. Step 4: Simplify right side
    85,751.11x = 5,252,749,622.06
  5. Step 5: Solve for x
    x = 5,252,749,622.06/85,751.11
  6. Step 6: Final answer
    x = 61,255.76

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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.