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Finding the Fourth Proportional to 135,453.54, 186,885.45 and 87,631.14

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Solution

The fourth proportional to 135,453.54, 186,885.45 and 87,631.14 is: 120,904.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,453.54 : 186,885.45 = 87,631.14 : x
  2. Step 2: Convert to fraction form
    135,453.54/186,885.45 = 87,631.14/x
  3. Step 3: Cross multiply
    135,453.54x = 186,885.45 × 87,631.14
  4. Step 4: Simplify right side
    135,453.54x = 16,376,985,032.91
  5. Step 5: Solve for x
    x = 16,376,985,032.91/135,453.54
  6. Step 6: Final answer
    x = 120,904.81

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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.