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Finding the Fourth Proportional to 72,554.75, 108,874.14 and 30,431.07

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Solution

The fourth proportional to 72,554.75, 108,874.14 and 30,431.07 is: 45,664.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,554.75 : 108,874.14 = 30,431.07 : x
  2. Step 2: Convert to fraction form
    72,554.75/108,874.14 = 30,431.07/x
  3. Step 3: Cross multiply
    72,554.75x = 108,874.14 × 30,431.07
  4. Step 4: Simplify right side
    72,554.75x = 3,313,156,575.53
  5. Step 5: Solve for x
    x = 3,313,156,575.53/72,554.75
  6. Step 6: Final answer
    x = 45,664.23

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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.