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Finding the Fourth Proportional to 72,426.70, 108,627.90 and 19,823.68

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Solution

The fourth proportional to 72,426.70, 108,627.90 and 19,823.68 is: 29,732.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,426.70 : 108,627.90 = 19,823.68 : x
  2. Step 2: Convert to fraction form
    72,426.70/108,627.90 = 19,823.68/x
  3. Step 3: Cross multiply
    72,426.70x = 108,627.90 × 19,823.68
  4. Step 4: Simplify right side
    72,426.70x = 2,153,404,728.67
  5. Step 5: Solve for x
    x = 2,153,404,728.67/72,426.70
  6. Step 6: Final answer
    x = 29,732.19

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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.