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Finding the Fourth Proportional to 71,628.68, 98,847.87 and 39,798.92

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Solution

The fourth proportional to 71,628.68, 98,847.87 and 39,798.92 is: 54,922.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,628.68 : 98,847.87 = 39,798.92 : x
  2. Step 2: Convert to fraction form
    71,628.68/98,847.87 = 39,798.92/x
  3. Step 3: Cross multiply
    71,628.68x = 98,847.87 × 39,798.92
  4. Step 4: Simplify right side
    71,628.68x = 3,934,038,470.30
  5. Step 5: Solve for x
    x = 3,934,038,470.30/71,628.68
  6. Step 6: Final answer
    x = 54,922.67

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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.