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Finding the Fourth Proportional to 68,575.79, 94,653.61 and 39,900.98

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Solution

The fourth proportional to 68,575.79, 94,653.61 and 39,900.98 is: 55,074.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,575.79 : 94,653.61 = 39,900.98 : x
  2. Step 2: Convert to fraction form
    68,575.79/94,653.61 = 39,900.98/x
  3. Step 3: Cross multiply
    68,575.79x = 94,653.61 × 39,900.98
  4. Step 4: Simplify right side
    68,575.79x = 3,776,771,936.42
  5. Step 5: Solve for x
    x = 3,776,771,936.42/68,575.79
  6. Step 6: Final answer
    x = 55,074.42

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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.