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Finding the Fourth Proportional to 69,690.40, 96,174.98 and 39,480.64

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Solution

The fourth proportional to 69,690.40, 96,174.98 and 39,480.64 is: 54,484.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,690.40 : 96,174.98 = 39,480.64 : x
  2. Step 2: Convert to fraction form
    69,690.40/96,174.98 = 39,480.64/x
  3. Step 3: Cross multiply
    69,690.40x = 96,174.98 × 39,480.64
  4. Step 4: Simplify right side
    69,690.40x = 3,797,049,762.39
  5. Step 5: Solve for x
    x = 3,797,049,762.39/69,690.40
  6. Step 6: Final answer
    x = 54,484.55

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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.