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Finding the Fourth Proportional to 79,281.14, 118,939.91 and 26,689.22

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Solution

The fourth proportional to 79,281.14, 118,939.91 and 26,689.22 is: 40,039.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,281.14 : 118,939.91 = 26,689.22 : x
  2. Step 2: Convert to fraction form
    79,281.14/118,939.91 = 26,689.22/x
  3. Step 3: Cross multiply
    79,281.14x = 118,939.91 × 26,689.22
  4. Step 4: Simplify right side
    79,281.14x = 3,174,413,424.77
  5. Step 5: Solve for x
    x = 3,174,413,424.77/79,281.14
  6. Step 6: Final answer
    x = 40,039.96

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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.