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Finding the Fourth Proportional to 72,021.96, 108,036.99 and 19,435.55

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Solution

The fourth proportional to 72,021.96, 108,036.99 and 19,435.55 is: 29,154.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,021.96 : 108,036.99 = 19,435.55 : x
  2. Step 2: Convert to fraction form
    72,021.96/108,036.99 = 19,435.55/x
  3. Step 3: Cross multiply
    72,021.96x = 108,036.99 × 19,435.55
  4. Step 4: Simplify right side
    72,021.96x = 2,099,757,780.81
  5. Step 5: Solve for x
    x = 2,099,757,780.81/72,021.96
  6. Step 6: Final answer
    x = 29,154.41

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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.