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Finding the Fourth Proportional to 68,686.81, 94,739.09 and 42,858.37

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Solution

The fourth proportional to 68,686.81, 94,739.09 and 42,858.37 is: 59,114.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,686.81 : 94,739.09 = 42,858.37 : x
  2. Step 2: Convert to fraction form
    68,686.81/94,739.09 = 42,858.37/x
  3. Step 3: Cross multiply
    68,686.81x = 94,739.09 × 42,858.37
  4. Step 4: Simplify right side
    68,686.81x = 4,060,363,105.21
  5. Step 5: Solve for x
    x = 4,060,363,105.21/68,686.81
  6. Step 6: Final answer
    x = 59,114.16

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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.