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Finding the Fourth Proportional to 68,405.60, 94,392.54 and 39,719.66

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Solution

The fourth proportional to 68,405.60, 94,392.54 and 39,719.66 is: 54,808.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,405.60 : 94,392.54 = 39,719.66 : x
  2. Step 2: Convert to fraction form
    68,405.60/94,392.54 = 39,719.66/x
  3. Step 3: Cross multiply
    68,405.60x = 94,392.54 × 39,719.66
  4. Step 4: Simplify right side
    68,405.60x = 3,749,239,123.37
  5. Step 5: Solve for x
    x = 3,749,239,123.37/68,405.60
  6. Step 6: Final answer
    x = 54,808.95

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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.