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Finding the Fourth Proportional to 90,091.76, 124,313.92 and 51,836.76

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Solution

The fourth proportional to 90,091.76, 124,313.92 and 51,836.76 is: 71,527.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,091.76 : 124,313.92 = 51,836.76 : x
  2. Step 2: Convert to fraction form
    90,091.76/124,313.92 = 51,836.76/x
  3. Step 3: Cross multiply
    90,091.76x = 124,313.92 × 51,836.76
  4. Step 4: Simplify right side
    90,091.76x = 6,444,030,835.70
  5. Step 5: Solve for x
    x = 6,444,030,835.70/90,091.76
  6. Step 6: Final answer
    x = 71,527.42

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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.