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Finding the Fourth Proportional to 85,792.08, 128,507.08 and 68,833.27

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Solution

The fourth proportional to 85,792.08, 128,507.08 and 68,833.27 is: 103,104.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,792.08 : 128,507.08 = 68,833.27 : x
  2. Step 2: Convert to fraction form
    85,792.08/128,507.08 = 68,833.27/x
  3. Step 3: Cross multiply
    85,792.08x = 128,507.08 × 68,833.27
  4. Step 4: Simplify right side
    85,792.08x = 8,845,562,534.55
  5. Step 5: Solve for x
    x = 8,845,562,534.55/85,792.08
  6. Step 6: Final answer
    x = 103,104.65

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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.