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Finding the Fourth Proportional to 85,992.56, 118,639.32 and 56,201.84

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Solution

The fourth proportional to 85,992.56, 118,639.32 and 56,201.84 is: 77,538.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,992.56 : 118,639.32 = 56,201.84 : x
  2. Step 2: Convert to fraction form
    85,992.56/118,639.32 = 56,201.84/x
  3. Step 3: Cross multiply
    85,992.56x = 118,639.32 × 56,201.84
  4. Step 4: Simplify right side
    85,992.56x = 6,667,748,080.35
  5. Step 5: Solve for x
    x = 6,667,748,080.35/85,992.56
  6. Step 6: Final answer
    x = 77,538.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.