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Finding the Fourth Proportional to 71,508.02, 107,267.15 and 18,916.88

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Solution

The fourth proportional to 71,508.02, 107,267.15 and 18,916.88 is: 28,376.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,508.02 : 107,267.15 = 18,916.88 : x
  2. Step 2: Convert to fraction form
    71,508.02/107,267.15 = 18,916.88/x
  3. Step 3: Cross multiply
    71,508.02x = 107,267.15 × 18,916.88
  4. Step 4: Simplify right side
    71,508.02x = 2,029,159,315.45
  5. Step 5: Solve for x
    x = 2,029,159,315.45/71,508.02
  6. Step 6: Final answer
    x = 28,376.67

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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.