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Finding the Fourth Proportional to 92,991.91, 128,283.72 and 55,239.43

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Solution

The fourth proportional to 92,991.91, 128,283.72 and 55,239.43 is: 76,203.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,991.91 : 128,283.72 = 55,239.43 : x
  2. Step 2: Convert to fraction form
    92,991.91/128,283.72 = 55,239.43/x
  3. Step 3: Cross multiply
    92,991.91x = 128,283.72 × 55,239.43
  4. Step 4: Simplify right side
    92,991.91x = 7,086,319,571.08
  5. Step 5: Solve for x
    x = 7,086,319,571.08/92,991.91
  6. Step 6: Final answer
    x = 76,203.61

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1.5x scale

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.