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Finding the Fourth Proportional to 90,937.94, 125,500.66 and 55,129.46

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Solution

The fourth proportional to 90,937.94, 125,500.66 and 55,129.46 is: 76,082.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,937.94 : 125,500.66 = 55,129.46 : x
  2. Step 2: Convert to fraction form
    90,937.94/125,500.66 = 55,129.46/x
  3. Step 3: Cross multiply
    90,937.94x = 125,500.66 × 55,129.46
  4. Step 4: Simplify right side
    90,937.94x = 6,918,783,615.44
  5. Step 5: Solve for x
    x = 6,918,783,615.44/90,937.94
  6. Step 6: Final answer
    x = 76,082.48

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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.