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Finding the Fourth Proportional to 287,630.72, 431,446.11 and 87,951.11

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Solution

The fourth proportional to 287,630.72, 431,446.11 and 87,951.11 is: 131,926.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,630.72 : 431,446.11 = 87,951.11 : x
  2. Step 2: Convert to fraction form
    287,630.72/431,446.11 = 87,951.11/x
  3. Step 3: Cross multiply
    287,630.72x = 431,446.11 × 87,951.11
  4. Step 4: Simplify right side
    287,630.72x = 37,946,162,601.60
  5. Step 5: Solve for x
    x = 37,946,162,601.60/287,630.72
  6. Step 6: Final answer
    x = 131,926.67

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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.