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Finding the Fourth Proportional to 68,687.81, 94,740.47 and 42,859.37

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Solution

The fourth proportional to 68,687.81, 94,740.47 and 42,859.37 is: 59,115.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,687.81 : 94,740.47 = 42,859.37 : x
  2. Step 2: Convert to fraction form
    68,687.81/94,740.47 = 42,859.37/x
  3. Step 3: Cross multiply
    68,687.81x = 94,740.47 × 42,859.37
  4. Step 4: Simplify right side
    68,687.81x = 4,060,516,857.70
  5. Step 5: Solve for x
    x = 4,060,516,857.70/68,687.81
  6. Step 6: Final answer
    x = 59,115.54

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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.