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Finding the Fourth Proportional to 90,838.56, 125,359.92 and 55,035.12

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Solution

The fourth proportional to 90,838.56, 125,359.92 and 55,035.12 is: 75,950.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,838.56 : 125,359.92 = 55,035.12 : x
  2. Step 2: Convert to fraction form
    90,838.56/125,359.92 = 55,035.12/x
  3. Step 3: Cross multiply
    90,838.56x = 125,359.92 × 55,035.12
  4. Step 4: Simplify right side
    90,838.56x = 6,899,198,240.39
  5. Step 5: Solve for x
    x = 6,899,198,240.39/90,838.56
  6. Step 6: Final answer
    x = 75,950.11

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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.