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Finding the Fourth Proportional to 208,387.76, 312,581.64 and 50,615.15

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Solution

The fourth proportional to 208,387.76, 312,581.64 and 50,615.15 is: 75,922.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,387.76 : 312,581.64 = 50,615.15 : x
  2. Step 2: Convert to fraction form
    208,387.76/312,581.64 = 50,615.15/x
  3. Step 3: Cross multiply
    208,387.76x = 312,581.64 × 50,615.15
  4. Step 4: Simplify right side
    208,387.76x = 15,821,366,595.85
  5. Step 5: Solve for x
    x = 15,821,366,595.85/208,387.76
  6. Step 6: Final answer
    x = 75,922.73

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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.