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Finding the Fourth Proportional to 92,638.81, 138,889.10 and 43,379.29

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Solution

The fourth proportional to 92,638.81, 138,889.10 and 43,379.29 is: 65,036.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,638.81 : 138,889.10 = 43,379.29 : x
  2. Step 2: Convert to fraction form
    92,638.81/138,889.10 = 43,379.29/x
  3. Step 3: Cross multiply
    92,638.81x = 138,889.10 × 43,379.29
  4. Step 4: Simplify right side
    92,638.81x = 6,024,910,329.84
  5. Step 5: Solve for x
    x = 6,024,910,329.84/92,638.81
  6. Step 6: Final answer
    x = 65,036.57

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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.