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Finding the Fourth Proportional to 81,317.96, 121,929.01 and 37,992.97

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Solution

The fourth proportional to 81,317.96, 121,929.01 and 37,992.97 is: 56,967.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,317.96 : 121,929.01 = 37,992.97 : x
  2. Step 2: Convert to fraction form
    81,317.96/121,929.01 = 37,992.97/x
  3. Step 3: Cross multiply
    81,317.96x = 121,929.01 × 37,992.97
  4. Step 4: Simplify right side
    81,317.96x = 4,632,445,672.84
  5. Step 5: Solve for x
    x = 4,632,445,672.84/81,317.96
  6. Step 6: Final answer
    x = 56,967.07

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1.5x scale

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.