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Finding the Fourth Proportional to 79,938.94, 119,920.25 and 26,613.50

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Solution

The fourth proportional to 79,938.94, 119,920.25 and 26,613.50 is: 39,924.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,938.94 : 119,920.25 = 26,613.50 : x
  2. Step 2: Convert to fraction form
    79,938.94/119,920.25 = 26,613.50/x
  3. Step 3: Cross multiply
    79,938.94x = 119,920.25 × 26,613.50
  4. Step 4: Simplify right side
    79,938.94x = 3,191,497,573.38
  5. Step 5: Solve for x
    x = 3,191,497,573.38/79,938.94
  6. Step 6: Final answer
    x = 39,924.19

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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.