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Finding the Fourth Proportional to 72,144.70, 108,217.05 and 19,554.19

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Solution

The fourth proportional to 72,144.70, 108,217.05 and 19,554.19 is: 29,331.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,144.70 : 108,217.05 = 19,554.19 : x
  2. Step 2: Convert to fraction form
    72,144.70/108,217.05 = 19,554.19/x
  3. Step 3: Cross multiply
    72,144.70x = 108,217.05 × 19,554.19
  4. Step 4: Simplify right side
    72,144.70x = 2,116,096,756.94
  5. Step 5: Solve for x
    x = 2,116,096,756.94/72,144.70
  6. Step 6: Final answer
    x = 29,331.29

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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.