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Finding the Fourth Proportional to 90,215.11, 124,495.11 and 49,928.89

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Solution

The fourth proportional to 90,215.11, 124,495.11 and 49,928.89 is: 68,900.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,215.11 : 124,495.11 = 49,928.89 : x
  2. Step 2: Convert to fraction form
    90,215.11/124,495.11 = 49,928.89/x
  3. Step 3: Cross multiply
    90,215.11x = 124,495.11 × 49,928.89
  4. Step 4: Simplify right side
    90,215.11x = 6,215,902,652.73
  5. Step 5: Solve for x
    x = 6,215,902,652.73/90,215.11
  6. Step 6: Final answer
    x = 68,900.90

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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.