Home / 103,211.10-155,166.60-82,416.78

Finding the Fourth Proportional to 103,211.10, 155,166.60 and 82,416.78

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Solution

The fourth proportional to 103,211.10, 155,166.60 and 82,416.78 is: 123,904.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,211.10 : 155,166.60 = 82,416.78 : x
  2. Step 2: Convert to fraction form
    103,211.10/155,166.60 = 82,416.78/x
  3. Step 3: Cross multiply
    103,211.10x = 155,166.60 × 82,416.78
  4. Step 4: Simplify right side
    103,211.10x = 12,788,331,535.55
  5. Step 5: Solve for x
    x = 12,788,331,535.55/103,211.10
  6. Step 6: Final answer
    x = 123,904.61

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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.