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Finding the Fourth Proportional to 82,930.70, 124,213.72 and 68,536.04

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Solution

The fourth proportional to 82,930.70, 124,213.72 and 68,536.04 is: 102,653.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,930.70 : 124,213.72 = 68,536.04 : x
  2. Step 2: Convert to fraction form
    82,930.70/124,213.72 = 68,536.04/x
  3. Step 3: Cross multiply
    82,930.70x = 124,213.72 × 68,536.04
  4. Step 4: Simplify right side
    82,930.70x = 8,513,116,155.86
  5. Step 5: Solve for x
    x = 8,513,116,155.86/82,930.70
  6. Step 6: Final answer
    x = 102,653.37

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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.