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Finding the Fourth Proportional to 90,571.40, 135,895.56 and 48,440.56

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Solution

The fourth proportional to 90,571.40, 135,895.56 and 48,440.56 is: 72,681.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,571.40 : 135,895.56 = 48,440.56 : x
  2. Step 2: Convert to fraction form
    90,571.40/135,895.56 = 48,440.56/x
  3. Step 3: Cross multiply
    90,571.40x = 135,895.56 × 48,440.56
  4. Step 4: Simplify right side
    90,571.40x = 6,582,857,027.91
  5. Step 5: Solve for x
    x = 6,582,857,027.91/90,571.40
  6. Step 6: Final answer
    x = 72,681.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.