Home / 75,351.90-113,139.45-42,138.30

Finding the Fourth Proportional to 75,351.90, 113,139.45 and 42,138.30

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Solution

The fourth proportional to 75,351.90, 113,139.45 and 42,138.30 is: 63,269.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,351.90 : 113,139.45 = 42,138.30 : x
  2. Step 2: Convert to fraction form
    75,351.90/113,139.45 = 42,138.30/x
  3. Step 3: Cross multiply
    75,351.90x = 113,139.45 × 42,138.30
  4. Step 4: Simplify right side
    75,351.90x = 4,767,504,085.94
  5. Step 5: Solve for x
    x = 4,767,504,085.94/75,351.90
  6. Step 6: Final answer
    x = 63,269.86

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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.