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Finding the Fourth Proportional to 91,992.87, 126,961.90 and 56,175.35

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Solution

The fourth proportional to 91,992.87, 126,961.90 and 56,175.35 is: 77,529.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,992.87 : 126,961.90 = 56,175.35 : x
  2. Step 2: Convert to fraction form
    91,992.87/126,961.90 = 56,175.35/x
  3. Step 3: Cross multiply
    91,992.87x = 126,961.90 × 56,175.35
  4. Step 4: Simplify right side
    91,992.87x = 7,132,128,393.92
  5. Step 5: Solve for x
    x = 7,132,128,393.92/91,992.87
  6. Step 6: Final answer
    x = 77,529.14

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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.