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Finding the Fourth Proportional to 72,608.79, 100,156.66 and 45,704.60

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Solution

The fourth proportional to 72,608.79, 100,156.66 and 45,704.60 is: 63,044.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,608.79 : 100,156.66 = 45,704.60 : x
  2. Step 2: Convert to fraction form
    72,608.79/100,156.66 = 45,704.60/x
  3. Step 3: Cross multiply
    72,608.79x = 100,156.66 × 45,704.60
  4. Step 4: Simplify right side
    72,608.79x = 4,577,620,082.64
  5. Step 5: Solve for x
    x = 4,577,620,082.64/72,608.79
  6. Step 6: Final answer
    x = 63,044.99

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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.