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Finding the Fourth Proportional to 68,135.52, 94,012.65 and 39,835.74

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Solution

The fourth proportional to 68,135.52, 94,012.65 and 39,835.74 is: 54,964.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,135.52 : 94,012.65 = 39,835.74 : x
  2. Step 2: Convert to fraction form
    68,135.52/94,012.65 = 39,835.74/x
  3. Step 3: Cross multiply
    68,135.52x = 94,012.65 × 39,835.74
  4. Step 4: Simplify right side
    68,135.52x = 3,745,063,482.11
  5. Step 5: Solve for x
    x = 3,745,063,482.11/68,135.52
  6. Step 6: Final answer
    x = 54,964.92

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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.