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Finding the Fourth Proportional to 79,665.12, 119,169.36 and 65,465.28

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Solution

The fourth proportional to 79,665.12, 119,169.36 and 65,465.28 is: 97,928.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,665.12 : 119,169.36 = 65,465.28 : x
  2. Step 2: Convert to fraction form
    79,665.12/119,169.36 = 65,465.28/x
  3. Step 3: Cross multiply
    79,665.12x = 119,169.36 × 65,465.28
  4. Step 4: Simplify right side
    79,665.12x = 7,801,455,519.82
  5. Step 5: Solve for x
    x = 7,801,455,519.82/79,665.12
  6. Step 6: Final answer
    x = 97,928.12

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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.