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Finding the Fourth Proportional to 79,912.80, 119,723.40 and 65,041.20

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Solution

The fourth proportional to 79,912.80, 119,723.40 and 65,041.20 is: 97,443.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,912.80 : 119,723.40 = 65,041.20 : x
  2. Step 2: Convert to fraction form
    79,912.80/119,723.40 = 65,041.20/x
  3. Step 3: Cross multiply
    79,912.80x = 119,723.40 × 65,041.20
  4. Step 4: Simplify right side
    79,912.80x = 7,786,953,604.08
  5. Step 5: Solve for x
    x = 7,786,953,604.08/79,912.80
  6. Step 6: Final answer
    x = 97,443.13

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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.