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Finding the Fourth Proportional to 91,992.60, 138,005.30 and 25,431.26

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Solution

The fourth proportional to 91,992.60, 138,005.30 and 25,431.26 is: 38,151.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,992.60 : 138,005.30 = 25,431.26 : x
  2. Step 2: Convert to fraction form
    91,992.60/138,005.30 = 25,431.26/x
  3. Step 3: Cross multiply
    91,992.60x = 138,005.30 × 25,431.26
  4. Step 4: Simplify right side
    91,992.60x = 3,509,648,039.23
  5. Step 5: Solve for x
    x = 3,509,648,039.23/91,992.60
  6. Step 6: Final answer
    x = 38,151.42

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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.