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Finding the Fourth Proportional to 90,709.92, 125,178.88 and 50,422.64

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Solution

The fourth proportional to 90,709.92, 125,178.88 and 50,422.64 is: 69,582.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,709.92 : 125,178.88 = 50,422.64 : x
  2. Step 2: Convert to fraction form
    90,709.92/125,178.88 = 50,422.64/x
  3. Step 3: Cross multiply
    90,709.92x = 125,178.88 × 50,422.64
  4. Step 4: Simplify right side
    90,709.92x = 6,311,849,601.84
  5. Step 5: Solve for x
    x = 6,311,849,601.84/90,709.92
  6. Step 6: Final answer
    x = 69,582.79

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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.