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Finding the Fourth Proportional to 85,923.97, 128,980.23 and 68,268.10

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Solution

The fourth proportional to 85,923.97, 128,980.23 and 68,268.10 is: 102,477.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,923.97 : 128,980.23 = 68,268.10 : x
  2. Step 2: Convert to fraction form
    85,923.97/128,980.23 = 68,268.10/x
  3. Step 3: Cross multiply
    85,923.97x = 128,980.23 × 68,268.10
  4. Step 4: Simplify right side
    85,923.97x = 8,805,235,239.66
  5. Step 5: Solve for x
    x = 8,805,235,239.66/85,923.97
  6. Step 6: Final answer
    x = 102,477.05

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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.