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Finding the Fourth Proportional to 85,366.86, 128,017.49 and 58,991.64

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Solution

The fourth proportional to 85,366.86, 128,017.49 and 58,991.64 is: 88,464.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,366.86 : 128,017.49 = 58,991.64 : x
  2. Step 2: Convert to fraction form
    85,366.86/128,017.49 = 58,991.64/x
  3. Step 3: Cross multiply
    85,366.86x = 128,017.49 × 58,991.64
  4. Step 4: Simplify right side
    85,366.86x = 7,551,961,388.83
  5. Step 5: Solve for x
    x = 7,551,961,388.83/85,366.86
  6. Step 6: Final answer
    x = 88,464.79

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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.