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Finding the Fourth Proportional to 125,408.96, 188,112.92 and 45,428.21

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Solution

The fourth proportional to 125,408.96, 188,112.92 and 45,428.21 is: 68,142.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,408.96 : 188,112.92 = 45,428.21 : x
  2. Step 2: Convert to fraction form
    125,408.96/188,112.92 = 45,428.21/x
  3. Step 3: Cross multiply
    125,408.96x = 188,112.92 × 45,428.21
  4. Step 4: Simplify right side
    125,408.96x = 8,545,633,233.47
  5. Step 5: Solve for x
    x = 8,545,633,233.47/125,408.96
  6. Step 6: Final answer
    x = 68,142.13

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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.