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Finding the Fourth Proportional to 266,061.28, 399,157.53 and 79,072.78

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Solution

The fourth proportional to 266,061.28, 399,157.53 and 79,072.78 is: 118,628.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,061.28 : 399,157.53 = 79,072.78 : x
  2. Step 2: Convert to fraction form
    266,061.28/399,157.53 = 79,072.78/x
  3. Step 3: Cross multiply
    266,061.28x = 399,157.53 × 79,072.78
  4. Step 4: Simplify right side
    266,061.28x = 31,562,495,555.03
  5. Step 5: Solve for x
    x = 31,562,495,555.03/266,061.28
  6. Step 6: Final answer
    x = 118,628.67

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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.