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Finding the Fourth Proportional to 89,835.40, 134,493.90 and 87,243.40

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Solution

The fourth proportional to 89,835.40, 134,493.90 and 87,243.40 is: 130,613.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,835.40 : 134,493.90 = 87,243.40 : x
  2. Step 2: Convert to fraction form
    89,835.40/134,493.90 = 87,243.40/x
  3. Step 3: Cross multiply
    89,835.40x = 134,493.90 × 87,243.40
  4. Step 4: Simplify right side
    89,835.40x = 11,733,705,115.26
  5. Step 5: Solve for x
    x = 11,733,705,115.26/89,835.40
  6. Step 6: Final answer
    x = 130,613.38

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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.