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Finding the Fourth Proportional to 90,374.49, 135,431.87 and 50,848.11

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Solution

The fourth proportional to 90,374.49, 135,431.87 and 50,848.11 is: 76,199.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,374.49 : 135,431.87 = 50,848.11 : x
  2. Step 2: Convert to fraction form
    90,374.49/135,431.87 = 50,848.11/x
  3. Step 3: Cross multiply
    90,374.49x = 135,431.87 × 50,848.11
  4. Step 4: Simplify right side
    90,374.49x = 6,886,454,369.03
  5. Step 5: Solve for x
    x = 6,886,454,369.03/90,374.49
  6. Step 6: Final answer
    x = 76,199.10

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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.