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Finding the Fourth Proportional to 85,690.96, 128,589.66 and 41,322.28

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Solution

The fourth proportional to 85,690.96, 128,589.66 and 41,322.28 is: 62,009.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,690.96 : 128,589.66 = 41,322.28 : x
  2. Step 2: Convert to fraction form
    85,690.96/128,589.66 = 41,322.28/x
  3. Step 3: Cross multiply
    85,690.96x = 128,589.66 × 41,322.28
  4. Step 4: Simplify right side
    85,690.96x = 5,313,617,935.62
  5. Step 5: Solve for x
    x = 5,313,617,935.62/85,690.96
  6. Step 6: Final answer
    x = 62,009.08

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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.