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Finding the Fourth Proportional to 92,939.50, 128,256.48 and 55,213.75

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Solution

The fourth proportional to 92,939.50, 128,256.48 and 55,213.75 is: 76,194.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,939.50 : 128,256.48 = 55,213.75 : x
  2. Step 2: Convert to fraction form
    92,939.50/128,256.48 = 55,213.75/x
  3. Step 3: Cross multiply
    92,939.50x = 128,256.48 × 55,213.75
  4. Step 4: Simplify right side
    92,939.50x = 7,081,521,382.92
  5. Step 5: Solve for x
    x = 7,081,521,382.92/92,939.50
  6. Step 6: Final answer
    x = 76,194.96

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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.