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Finding the Fourth Proportional to 71,958.51, 107,929.35 and 19,363.86

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Solution

The fourth proportional to 71,958.51, 107,929.35 and 19,363.86 is: 29,043.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,958.51 : 107,929.35 = 19,363.86 : x
  2. Step 2: Convert to fraction form
    71,958.51/107,929.35 = 19,363.86/x
  3. Step 3: Cross multiply
    71,958.51x = 107,929.35 × 19,363.86
  4. Step 4: Simplify right side
    71,958.51x = 2,089,928,823.29
  5. Step 5: Solve for x
    x = 2,089,928,823.29/71,958.51
  6. Step 6: Final answer
    x = 29,043.53

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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.