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Finding the Fourth Proportional to 280,992.88, 421,541.29 and 88,915.67

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Solution

The fourth proportional to 280,992.88, 421,541.29 and 88,915.67 is: 133,389.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,992.88 : 421,541.29 = 88,915.67 : x
  2. Step 2: Convert to fraction form
    280,992.88/421,541.29 = 88,915.67/x
  3. Step 3: Cross multiply
    280,992.88x = 421,541.29 × 88,915.67
  4. Step 4: Simplify right side
    280,992.88x = 37,481,624,125.31
  5. Step 5: Solve for x
    x = 37,481,624,125.31/280,992.88
  6. Step 6: Final answer
    x = 133,389.94

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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.