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Finding the Fourth Proportional to 92,400.68, 138,609.78 and 25,840.80

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Solution

The fourth proportional to 92,400.68, 138,609.78 and 25,840.80 is: 38,763.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,400.68 : 138,609.78 = 25,840.80 : x
  2. Step 2: Convert to fraction form
    92,400.68/138,609.78 = 25,840.80/x
  3. Step 3: Cross multiply
    92,400.68x = 138,609.78 × 25,840.80
  4. Step 4: Simplify right side
    92,400.68x = 3,581,787,506.12
  5. Step 5: Solve for x
    x = 3,581,787,506.12/92,400.68
  6. Step 6: Final answer
    x = 38,763.65

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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.