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Finding the Fourth Proportional to 72,206.84, 99,670.53 and 49,620.60

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Solution

The fourth proportional to 72,206.84, 99,670.53 and 49,620.60 is: 68,493.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,206.84 : 99,670.53 = 49,620.60 : x
  2. Step 2: Convert to fraction form
    72,206.84/99,670.53 = 49,620.60/x
  3. Step 3: Cross multiply
    72,206.84x = 99,670.53 × 49,620.60
  4. Step 4: Simplify right side
    72,206.84x = 4,945,711,500.92
  5. Step 5: Solve for x
    x = 4,945,711,500.92/72,206.84
  6. Step 6: Final answer
    x = 68,493.67

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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.