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Finding the Fourth Proportional to 71,812.20, 107,722.98 and 58,636.20

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Solution

The fourth proportional to 71,812.20, 107,722.98 and 58,636.20 is: 87,958.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,812.20 : 107,722.98 = 58,636.20 : x
  2. Step 2: Convert to fraction form
    71,812.20/107,722.98 = 58,636.20/x
  3. Step 3: Cross multiply
    71,812.20x = 107,722.98 × 58,636.20
  4. Step 4: Simplify right side
    71,812.20x = 6,316,466,199.88
  5. Step 5: Solve for x
    x = 6,316,466,199.88/71,812.20
  6. Step 6: Final answer
    x = 87,958.12

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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.