Home / 90,838.20-136,338.30-53,351.40

Finding the Fourth Proportional to 90,838.20, 136,338.30 and 53,351.40

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Solution

The fourth proportional to 90,838.20, 136,338.30 and 53,351.40 is: 80,074.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,838.20 : 136,338.30 = 53,351.40 : x
  2. Step 2: Convert to fraction form
    90,838.20/136,338.30 = 53,351.40/x
  3. Step 3: Cross multiply
    90,838.20x = 136,338.30 × 53,351.40
  4. Step 4: Simplify right side
    90,838.20x = 7,273,839,178.62
  5. Step 5: Solve for x
    x = 7,273,839,178.62/90,838.20
  6. Step 6: Final answer
    x = 80,074.67

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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.