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Finding the Fourth Proportional to 139,408.38, 192,386.43 and 75,750.30

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Solution

The fourth proportional to 139,408.38, 192,386.43 and 75,750.30 is: 104,536.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,408.38 : 192,386.43 = 75,750.30 : x
  2. Step 2: Convert to fraction form
    139,408.38/192,386.43 = 75,750.30/x
  3. Step 3: Cross multiply
    139,408.38x = 192,386.43 × 75,750.30
  4. Step 4: Simplify right side
    139,408.38x = 14,573,329,788.43
  5. Step 5: Solve for x
    x = 14,573,329,788.43/139,408.38
  6. Step 6: Final answer
    x = 104,536.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.