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Finding the Fourth Proportional to 101,428.80, 152,230.67 and 39,143.04

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Solution

The fourth proportional to 101,428.80, 152,230.67 and 39,143.04 is: 58,748.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,428.80 : 152,230.67 = 39,143.04 : x
  2. Step 2: Convert to fraction form
    101,428.80/152,230.67 = 39,143.04/x
  3. Step 3: Cross multiply
    101,428.80x = 152,230.67 × 39,143.04
  4. Step 4: Simplify right side
    101,428.80x = 5,958,771,205.04
  5. Step 5: Solve for x
    x = 5,958,771,205.04/101,428.80
  6. Step 6: Final answer
    x = 58,748.32

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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.